A Review of Philenis Champion , 1906 ( Coleoptera : Curculionidae : Conoderinae ) , with Descriptions of New Species from Central and South America

A brief review of the history of the taxonomic treatment of the genus Philenis Champion is presented and characters are discussed. Philenis flavipes Champion and P. fuscofemorata Champion, and 11 new species are described, including the first records from South America: P. anzaldoi new species (Costa Rica, Panamá), P. costaricensis new species (Costa Rica), P. laselvaensis new species (Costa Rica), P. auritibiae new species (Costa Rica), P. brunnea new species (Costa Rica, Panamá), P. muscamimetica new species (Panamá), P. chiriquiensis new species (Panamá), P. guyanensis new species (French Guiana), P. ferruginea new species (Ecuador), P. howdeni new species (Ecuador), and P. kuscheli new species (Colombia, Ecuador). A key is provided to separate the species, and an unusual type of “multifurcate” scale is reported for some species. Two species have been associated with plants of the family Araceae. Most collections of this genus by the Arthropods of La Selva (ALAS) biodiversity project in Costa Rica were made by passive trapping methods during the dry season and at lower to middle elevations along an altitudinal transect on the slopes of Volcan Barva. The coloration of some species in the genus is hypothesized to mimic social Hymenoptera or flies.


Introduction
The genus Philenis Champion [1] was described for two species from western Panama, P. flavipes Champion and P. fuscofemorata Champion, each based on a single specimen.Specimens of members of the genus are not common in collections, but have been accumulating, largely by passive sampling (see below, also [2]).The Arthropods of La Selva (ALAS) project collected at least 131 specimens of nine species at the La Selva Biological Station in Costa Rica [3] and on an altitudinal transect above La Selva and has stimulated this review.Anzaldo [4] mentions undescribed species in his review of conoderine genera.I have previously suggested [5] that some species in the genus may participate in mimicry complexes and reported a record of larval ecology.This paper describes 11 new species, describes an unusual new character, reports the genus for the first time from South America, and describes what little is known about the biology of members of the genus.A few specimens could not be assigned with certainty to any of the species treated here and may represent either extreme variants or additional undescribed species.

Materials and Methods
Only part of the specimens collected by the ALAS project were available for this study.At the time of the original processing of the ALAS material, only a few specimens of commoner species were retained for study, and the rest were deposited with the Instituto Nacional de Biodiversidad (INBio) Head 1.00 mm wide, convex in dorsal view, eyes contiguous at upper 1/2; rostrum slender, nearly straight, polished and glabrous below antennal insertions, somewhat flattened dorsoventrally, 1.40 mm long, antennae inserted at basal 1/4.Pronotum 1.50 mm long, 2.00 mm wide at base, lateral margins weakly rounded from base to apex, in lateral view gibbous at basal 1/4 and declivous anteriorly.vaguely carinate along medial 1/2 of midline.Scutellum narrowly ovate lengthwise.Elytra 0.5 wider than pronotum, humeri moderately prominent, intervals broad, striae nearly linear.Mesosternum declivous, flat, posterior margin straight, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 very convex, 1.4 mm long along midline, ventrite 2 only 0.2 mm long along midline, ventrites 3-5 very narrow, ascending.From front, procoxae broadly rounded-triangular with large tooth on inner margin.Metafemora with suggestion of lateral carina at middle and very weak tooth at distal 2/3.Head 1.00 mm wide, convex in dorsal view, eyes contiguous at upper 1/2; rostrum slender, nearly straight, polished and glabrous below antennal insertions, somewhat flattened dorsoventrally, 1.40 mm long, antennae inserted at basal 1/4.Pronotum 1.50 mm long, 2.00 mm wide at base, lateral margins weakly rounded from base to apex, in lateral view gibbous at basal 1/4 and declivous anteriorly.vaguely carinate along medial 1/2 of midline.Scutellum narrowly ovate lengthwise.Elytra 0.5 wider than pronotum, humeri moderately prominent, intervals broad, striae nearly linear.
Mesosternum declivous, flat, posterior margin straight, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 very convex, 1.4 mm long along midline, ventrite 2 only 0.2 mm long along midline, ventrites 3-5 very narrow, ascending.From front, procoxae broadly rounded-triangular with large tooth on inner margin.Metafemora with suggestion of lateral carina at middle and very weak tooth at distal 2/3.Specimens examined: Panamá, Bugaba, Champion (Holotype, BMNH).Costa Rica: Heredia: Est.Biol.La Selva., 50-150 m, 10 Discussion: This species differs most obviously from the following in the distinct pattern of the elytra with the transverse fasciae separating three darker areas, with the posterior one being the darkest.The overall color pattern of yellow and dark reddish brown and black suggests the coloration of social Hymenoptera [5], but the robust body form is unlike the slender habitus of wasps, and no particular model is obvious.The specimen from Heredia Province, Costa Rica, has a significantly longer (2.0 mm) and more slender rostrum, but does not differ appreciably in other ways.Specimens vary only slightly in size (5.15-5.30mm, x = 5.24, N = 6).The images in Anzaldo s work [4] attributed to P. flavipes are those of the next species.
Derivation of name: This species is named in honor of Salvatore Anzaldo for his review [4] of the conoderine genera of North and Central America.
Discussion: This is the species figured in Anzaldo's review [4] as Philenis flavipes.The two species are similar, but differ most obviously in the color and pattern of scales on the elytra.Specimens vary in length from 5.00-6.40mm, (x = 5.66, N = 12).

Philenis fuscofemorata Champion, 1906:44. [1]
Figures 3 and 4b Redescription: Body size 4.50 mm long, 2.40 mm wide.Moderately robust, elliptical, conspicuously narrower anteriorly, pronotum, mesosternum, mesepimera, epimeron, apical 1/4 of elytra, abdominal ventrites 4 and 5, coxae and femora black, otherwise head, metasternum, metepimera, abdominal ventrites 1-3, middle portion of metafemora, and tibiae reddish brown, and basal 3/4 of elytra darker reddish brown; sparsely to somewhat densely covered with complex pattern of scales: scales reddish-brown on reddish brown portion of elytra; scales black on black portion of elytra and in broad longitudinal stripes on pronotum lateral to midline; scales yellowish-white on head, on pronotum in narrow stripe along midline and on anterior portions of broad stripe along lateral margins extending to sides, on elytra in small slightly oblique spot on intervals 2-5 at basal 1/3 of elytra and in broader irregular oblique transverse fascia at apical 2/3 of elytra, along apical 1/2 of elytral suture and narrowly along elytral apices; in dorsal view, scales white in posterior portions of lateral margins of pronotum; ventrally, scales white, and more or less uniformly dense throughout and on femora, denser on metasternum and on metepisterna; scales golden on most of tibiae, except white on posterior margin of metatibiae; sides of pronotum and apical 3/4 of rostrum glabrous (Figure 3).and on femora, denser on metasternum and on metepisterna; scales golden on most of tibiae, except white on posterior margin of metatibiae; sides of pronotum and apical 3/4 of rostrum glabrous (Figure 3).Head 0.80 mm wide, 0.40 mm long, convex in dorsal view, eyes separated by 2 rows of small semi-erect scales; rostrum forming distinct obtuse angle at base with frons, rounded-rectangular in cross section, broadening toward apex, curved, micropunctate below antennal insertions, 1.25 mm long, antennae inserted at basal 1/5.Pronotum 1.45 mm long, 1.50 mm wide at base, lateral margins weakly convex at base then nearly straight to anterior collar, weakly convex on basal 2/3 in lateral view.weakly carinate along basal 2/3 of midline, posterior margin obliquely convergent from posterior angles and extended in rounded-acute projection anterior to scutellum.Scutellum small, round.
Mesosternum deeply emarginate and concave to receive apex of rostrum, lateral angles narrow, curved and raised interior to mesocoxae; anterior margin of metasternum strongly declivous.In Head 0.80 mm wide, 0.40 mm long, convex in dorsal view, eyes separated by 2 rows of small semi-erect scales; rostrum forming distinct obtuse angle at base with frons, rounded-rectangular in cross section, broadening toward apex, curved, micropunctate below antennal insertions, 1.25 mm long, antennae inserted at basal 1/5.Pronotum 1.45 mm long, 1.50 mm wide at base, lateral margins weakly convex at base then nearly straight to anterior collar, weakly convex on basal 2/3 in lateral view.weakly carinate along basal 2/3 of midline, posterior margin obliquely convergent from posterior angles and extended in rounded-acute projection anterior to scutellum.Scutellum small, round.
Mesosternum deeply emarginate and concave to receive apex of rostrum, lateral angles narrow, curved and raised interior to mesocoxae; anterior margin of metasternum strongly declivous.In lateral view abdominal ventrite 1 very weakly, broadly convex, slightly depressed along midline, posterior margin slightly narrowly emarginate, 1.10 mm long, ventrite 2 0.50 mm long along midline, strongly declivous at posterior margin, ventrites 3-5 narrow, subequal in length.From front, procoxae broadly rounded-triangular with long tooth on inner margin.Metafemora with tooth at distal 2/3, mesofemora with minute tooth at middle.Genitalia as in Figure 4b.Discussion: As treated here, this is a widespread and very variable species but may actually be a complex of sibling species.Initially I had separated out different groups of specimens based partially on geography and morphological characters, but variability within groups and overlaps in both geography and characters recommended this more conservative interpretation.There is also the possibility of significant sexual dimorphism that parallels that in the following species.As a consequence, many other collections from the ALAS transect initially determined as this species are probably this species but are not listed.Further study and collections, including genetic barcoding, is required.The coloration is somewhat suggestive of that of social Hymenoptera, but unspecific in pattern.
This species is similar to the following species, but is smaller in size and differs in other characters given in the key, below, especially the metafemoral teeth which are minute in P. fuscofemorata and strong in the following species.Specimens vary in length from 3.75-4.80mm, (x = 4.17, N = 22).

Philenis costaricensis Hespenheide new species
Figure 4c and Figure 5 http://zoobank.org/urn:lsid:zoobank.org:act:F4AC77DB-3F8B-4740-81C0-14780A0FF156Description: Holotype male: body size 5.20 mm long, 2.70 mm wide.Moderately robust, elliptical, narrower anteriorly, black, except tibiae, head, metasternum, and abdominal ventrites 1 and 2 reddish brown, basal 2/3 of elytra darker reddish brown; sparsely to somewhat densely covered with complex pattern of scales: scales reddish-brown on reddish brown portion of elytra; scales black on black portion of elytra and in broad longitudinal stripes on pronotum lateral to midline; scales yellowish-white on head, on metafemora, in slightly oblique transverse fascia on intervals 2-5 at basal 1/3 of elytra and in broader, irregular oblique transverse fascia at apical 2/3 of elytra, along apical 1/4 of elytral suture and narrowly along elytral apices; in dorsal view, scales white in longitudinal stripes along midline and lateral margins of pronotum, narrowly at base of elytra; ventrally scales white on procoxae and on pronotum just above procoxae, on metasternum, meso and metepisterna, abdominal ventrites, and fore-and mesofemora, denser on lateral portion of metasternum and on metepisterna, abdominal ventrite 5, and lateral margins of ventrites 2-4; scales golden on most of tibiae; sides of pronotum and apical 2/3 of rostrum glabrous.
Head 0.95 mm wide, 0.45 mm long, convex in dorsal view, eyes separated by 4 rows of small semi-erect scales; rostrum rounded-rectangular in cross section, curved, micropunctate below antennal insertions, weakly transversely depressed and weakly carinate along midline above antennal insertions, somewhat flattened dorsoventrally, 1.35 mm long, antennae inserted at basal 1/4.Pronotum 1.55 mm long, 1.80 mm wide at base, lateral margins weakly convex at base then nearly straight to anterior collar, weakly convex in lateral view.weakly carinate along basal 3/4 of midline, posterior margin extended in acute projection anterior to scutellum.Scutellum small, round.
Mesosternum emarginate and concave to receive apex of rostrum, lateral angles narrow and raised interior to mesocoxae; anterior margin of metasternum strongly declivous.In lateral view abdominal ventrite 1 nearly flat, very weakly, broadly concave, 1.20 mm long along midline, ventrite 2 Diversity 2018, 10, 84 9 of 24 0.45 mm long along midline, strongly declivous at posterior margin, ventrites 3-5 narrow, subequal in length.From front, procoxae broadly rounded-triangular with tooth on inner margin.Metafemora with small tooth at distal 3/5, mesofemora with minute tooth at middle.Genitalia as in Figure 4c.
Allotype female: Body size 5.00 mm long, 2.80 mm wide.Robust, elliptical, slightly narrower anteriorly; generally dark reddish brown, head, abdominal ventrites 1-3, and legs paler; pronotum above procoxae, coxae, abdominal ventrites 3-4, and interior surface of metafemora black; sparsely to somewhat densely covered with complex pattern of scales: scales dark-brown or black in broad longitudinal stripes on pronotum lateral to midline; scales yellowish-white on head, on pronotum in narrow stripe along midline and on anterior portions of broad stripes along lateral margins extending to sides; in dorsal view, scales white in posterior portions of lateral margins of pronotum, on elytra in small slightly spots anterior to humeri, narrowly on intervals 2-4 at base of elytra extending on intervals 1-2 to narrow weakly arcuate transverse fascia at basal 1/3, and in broader irregular oblique transverse fascia at apical 2/3, and on intervals 1-2 along apical 2/3 of elytral suture continuing narrowly along elytral apices; ventrally, scales white, and more or less uniformly dense throughout except absent on medial 2/3 of abdominal ventrites 3-4 and sparser on femora; scales pale golden on tibiae; sides of pronotum above procoxae, most of elytra, medial 2/3 of abdominal ventrites 3-4, and apical 3/4 of rostrum glabrous.and parallels that of P. fuscofemorata.The distinctive coloration suggests that it is mimetic, but no model is obvious.Specimens have been collected from lowlands to middle and higher elevations, above 1000 m.Males vary in length from 5.15-5.70mm, (x = 5.36, N = 6); females vary in length from 5.00-5.40mm, (x = 5.26, N = 5) Philenis laselvaensis Hespenheide new species Figure 4d and Figure 6 http://zoobank.org/urn:lsid:zoobank.org:act:6D85E6CE-E3A0-49B7-A2DC-6489BFD78F18 Description: Holotype male: body size 5.50 mm long, 2.80 mm wide.Moderately robust, elliptical, somewhat narrower anteriorly, from the side nearly flat above, convex below; black, except elytra, tibiae, antennae and rostrum reddish brown, elytra darker; sparsely to somewhat densely covered with complex pattern of scales, except rostrum below antennal insertions, most of elytra, and broad longitudinal areas lateral to midline of pronotum glabrous: scales reddish brown on most of tibiae; scales pale brownish-yellowish-white on head and in sparse, broad stripe along midline of pronotum; in dorsal view, scales yellow in broad longitudinal stripes along lateral margins of pronotum, on intervals 1 and 2 along suture and along apices of elytra, in weakly indicated transverse fascia at basal 1/4 of elytra and in weakly indicated oblique fascia just beyond middle of elytra; laterally and ventrally scales dense and white or yellowish white throughout; scales sparser on sides of femora (Figure 6).Elytra 1/3 wider than pronotum, humeri not prominent, widest at basal 1/3, intervals slightly broader than striae.
Mesosternum declivous, deeply quadrately emarginate to receive apex of rostrum with slightly  Derivation of name: This species is named for the La Selva Biological Station where this is the most frequently collected species of Philenis.See discussion below under ecology.
Discussion: The bright yellow scales of this common species are unique among the species treated here.Specimens varied in size from 4.9-6.5 mm (x = 5.93 mm, N = 17).

Philenis auritibiae Hespenheide new species
Figure 4a and Figure 7 http://zoobank.org/urn:lsid:zoobank.org:act:4F1E70FB-1D9A-4268-B8C6-514709681DFBDescription: Holotype: body size 5.55 mm long, 3.00 mm wide.Moderately robust, oboval, narrower anteriorly, black, except antennae and apical 2/3 of rostrum reddish brown, intervals 2-8 of elytral disc dark reddish brown; sparsely to somewhat densely covered with complex pattern of scales: scales reddish-brown on reddish brown portion of elytra and in small triangular spots anterior to humeri; scales golden on most of tibiae; scales yellowish-white between eyes, in narrow stripe along midline of pronotum and broad transverse fascia on basal 1/3 of elytra; in dorsal view, scales white in longitudinal stripes along lateral margins of pronotum, in narrow bands at bases and apices of elytra, along apical 1/6 of elytral suture and in broad transverse fascia at apical 2/3 of elytra; ventrally scales white on procoxae and on pronotum just above procoxae, on metasternum, meso and metepisterna, mesepimeron, posterior margins of abdominal ventrites 1 and 5, posterior 1 /2 of ventrite 2, and lateral margins of ventrites 3-4; scales sparser and white on femora and posterior margins of meso-and metatibiae, otherwise scales black; sides of pronotum and apical 3/4 of rostrum glabrous (Figure 7).
Head 1.00 mm wide, 0.50 mm long, very convex in dorsal view, eyes narrowly separated by 4 rows of semierect scales; rostrum slender, rounded-rectangular in cross section, widening slightly toward apex, from side slightly curved, 1.25 mm long, antennae inserted at basal 1/4.rostrum below antennal insertions micropunctate.
Pronotum 1.60 mm long, 1.70 mm wide at base, lateral margins weakly rounded to anterior collar, in lateral view gibbous at basal 1/3 and declivous anteriorly, posterior margin obliquely convergent, acute and slightly upturned anterior to scutellum.Scutellum small, rounded.
Mesosternum deeply concave, deeply emarginate at posterior margin to receive apex of rostrum, with blunt, raised teeth at lateral margins interior to mesocoxae, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 very weakly convex, 1.10 mm long and slightly depressed along midline, ventrite 2 ascending, 0.40 mm long along midline, weakly convex in lateral view, ventrites 3-5 narrow, subequal in length, ascending, From front, procoxae triangular with narrow tooth on inner margin.Metafemora with distinct acute tooth at distal 2/3.Genitalia as in Figure 4e.Derivation of name: The species name refers to the generally pale brown overall coloration.Discussion: This is the only completely pale brown species of Philenis in Central America.The color pattern of scales is similar to that of P. costaricensis (Figure 5).The two Costa Rican specimens are both males and equal in size.The specimen from Panama is probably a female and larger, 5.55 mm long, and has a few differences from the Costa Rican specimens -a stouter rostrum that is carinate at the base along the midline -but has the same distinctive albeit finer pattern of coloration.

Philenis muscamimetica Hespenheide new species
Figure 8 http://zoobank.org/urn:lsid:zoobank.org:act:025E7530-EAB2-4D59-8549-ED2EA6F9A3E1Description: Holotype: body size 5.75 mm long, 3.00 mm wide.Moderately robust, elliptical, somewhat narrower anteriorly, black throughout, except elytral disc reddish brown; sparsely to somewhat densely covered with scales: scales orange-red on vertex of head posterior to eyes and on anterior 1 /2 of pronotum dorsally extending on sides to middle of eyes; scales dense and yellowish on frons and on rostrum to antennal insertions; scales pale sparse brown on disc of pronotum; scales pale yellowish-brown on ventral 1/2 of procoxae, in narrow line on midline of basal 1/4 of pronotum, in narrow line along base of elytra, on interval 2 along suture for length of elytra, in narrow line along apices of elytra and in spots on intervals 9 and 10 at basal 1/4 of elytra and intervals 8-10 at apical 3/4 of elytra; scales white in broad irregular line from posterior angles of pronotum to posterior edge of red scales and along anterior edge of sides of pronotum to procoxae, on mesepisterna, dorsal 1/2 of epimera, middle 2/3 of metepistera, and metasternum; scales white in broadly triangular area on sides of abdominal ventrite, 1, on posterolateral 1/2 of ventrite 2, and on lateral 1/3 of ventrites 3-5, and on basal 1/2 of ventral surfaces of meso-and metafemora; elsewhere scales are dark brown or black or minute and inconspicuous.
Head 1.20 mm wide, 0.45 mm long, very convex in dorsal view, eyes narrowly separated by 2-4 rows of scales; rostrum narrowly carinate at and above antennal insertions, matte black below antennal insertions, widening slightly toward apex, from side slightly curved, 1.60 mm long, antennae inserted at basal 1/4.Pronotum 1.95 mm long, 2.25 mm wide at base, lateral margins weakly rounded from base to indistinct anterior collar, in lateral view weakly convex at base and declivous anteriorly, posterior margin narrowly acutely rounded and slightly upturned anterior to scutellum.Scutellum small, rounded-triangular.
Mesosternum concave, deeply emarginate at posterior margin to receive apex of rostrum with slightly elevated, rounded lateral lobes internal to mesocoxae, prosternum strongly excavate anterior to forecoxae, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 weakly convex, 1.90 mm long along midline, ventrite 2 0.50 mm long along midline, strongly declivous at posterior margin, ventrites 3-4 narrow, subequal in length, ascending, ventrite 5 longer.From front, procoxae broadly oval with large tooth on inner margin.Metafemora with strong acute tooth at distal 2/3, mesofemora with small, distinct tooth at distal 3/5, profemora angulate at middle. of elytra; scales white in broad irregular line from posterior angles of pronotum to posterior edge of red scales and along anterior edge of sides of pronotum to procoxae, on mesepisterna, dorsal 1/2 of epimera, middle 2/3 of metepistera, and metasternum; scales white in broadly triangular area on sides of abdominal ventrite, 1, on posterolateral 1/2 of ventrite 2, and on lateral 1/3 of ventrites 3-5, and on basal 1/2 of ventral surfaces of meso-and metafemora; elsewhere scales are dark brown or black or minute and inconspicuous.Elytra 1/2 wider than pronotum, humeri not prominent, widest at basal 1/4, intervals 2-3× broader than striae.
Mesosternum concave, deeply emarginate at posterior margin to receive apex of rostrum with slightly elevated, rounded lateral lobes internal to mesocoxae, prosternum strongly excavate anterior to forecoxae, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 weakly convex, 1.90 mm long along midline, ventrite 2 0.50 mm long along midline, strongly declivous at posterior margin, ventrites 3-4 narrow, subequal in length, ascending, ventrite 5 longer.From front, procoxae broadly oval with large tooth on inner margin.Metafemora with strong acute tooth at distal 2/3, mesofemora with small, distinct tooth at distal 3/5, profemora angulate at middle.Derivation of name: This species is named for its coloration, which is typical of conoderines in the putative fly mimicry complex [5,7] and is probably the same species mentioned by Anzaldo [4] as undescribed.
Discussion: As a putative fly mimic, Philenis muscamimetica stands uniquely apart from the other members in the genus treated here in terms of habitus.

Philenis chiriquiensis Hespenheide new species
Figure 4a,f and Figure 9 http://zoobank.org/urn:lsid:zoobank.org:act:F26FA38B-8035-4F2D-BF12-7C2F1FD09C51Description: Holotype male: body size 5.60 mm long, 2.90 mm wide.Moderately robust, elliptical, somewhat narrower anteriorly, reddish brown throughout, ventral surface and femora nearly black; sparsely to somewhat densely covered with complex pattern of scales: scales dark brown or black on most of elytra and on disc and oblique lateral stripe on pronotum; scales brownish yellow on tibiae, head and antero-medial stripe on midline of pronotum; scales pale brownish-white on femora, in broad longitudinal stripes along lateral margins of pronotum, on interval 1 and along suture and apical margins of elytra, along basal margins of elytra connecting to weakly oblique fascia at basal 1/3 of elytra and in broad oblique fascia just beyond middle of elytra; laterally and ventrally scales moderately dense and white throughout (Figure 9).Head 1.05 mm wide, 0.40 mm long, very convex in dorsal view, eyes narrowly separated by 2 rows of erect scales; rostrum weakly carinate at antennal insertions, polished below antennal insertions, widening from middle toward apex, from side slightly curved, 1.60 mm long, antennae inserted at basal 1/4.Pronotum 1.70 mm long, 2.00 mm wide at base, lateral margins weakly rounded' from base to indistinct anterior collar, in lateral view weakly gibbous at basal 1/4 and declivous anteriorly, disc strongly shining, posterior margin narrowly acutely rounded and slightly upturned anterior to scutellum.Scutellum small, round.
Mesosternum somewhat concave, deeply emarginate at posterior margin to receive apex of rostrum with slightly elevated, narrowly rounded lateral margins, prosternum strongly excavate anterior to procoxae, anterior margin of metasternum declivous and weakly concave.In lateral view abdominal ventrite 1 weakly convex, 1.40 mm long along midline, ventrite 2 0.60 mm long along midline, strongly declivous at posterior margin, ventrites 3-4 narrow, subequal in length, ascending, ventrite 5 longer.From front, procoxae broadly rounded-triangular with large tooth on inner margin.Metafemora with distinct tooth at distal 2/3, mesofemora weakly angulate at middle.Genitalia as in Figure 4f.Discussion: Philenis chiriquiensis is a relatively large, somewhat flattened, high elevation species, largely dark reddish brown in ground color dorsally and black ventrally, with a bold pattern of scales on the elytra.The Huether specimen is treated as conspecific but shows striking scales on the pronotum not shared by the other specimens.As with P. auritibiae, above, I term these scales "multifurcate" in that they branch separately and sequentially along the axis of the scale (Figure 4a), Discussion: Philenis chiriquiensis is a relatively large, somewhat flattened, high elevation species, largely dark reddish brown in ground color dorsally and black ventrally, with a bold pattern of scales on the elytra.The Huether specimen is treated as conspecific but shows striking scales on the pronotum not shared by the other specimens.As with P. auritibiae, above, I term these scales "multifurcate" in that they branch separately and sequentially along the axis of the scale (Figure 4a), a character that is also shared by two somewhat different specimens from the Monteverde area in Costa Rica that may represent an undescribed species.These scales differ from "multifid" scales of Anzaldo [4] (also termed "pectinate" by Champion [1]; "plumose" by Lyal et al. [8]) in the genera Philides Champion and Philinna Champion, as well as in Tachygonus Schoenherr, where the separate "fingers" of the scales all arise from the base, rather than sequentially along the axis.Specimens vary in length from 4.80-6.10mm, (x = 5.50, N = 7).

Philenis guyanensis Hespenheide new species
Figure 10b,c http://zoobank.org/urn:lsid:zoobank.org:act:E7158A1E-15F6-499C-A322-2D275F0F3202Description: Holotype male: body size 4.40 mm long, 2.50 mm wide.Very robust, elliptical, narrower anteriorly, pale reddish brown throughout, anterior angles of pronotum paler, disc of pronotum and oblique transverse bands just posterior to base and at middle darker; metatibiae and apices of metafemora, and triangular areas at apices of elytra exterior to intervals 1-2 black; sparsely to somewhat densely covered with complex pattern of scales: scales black on metatibiae and in triangular black areas at elytral apices; scales dark brown on darker areas of pronotum and elytra or black on most of elytra and on disc and oblique lateral stripe on pronotum; scales golden yellow elsewhere; rostrum below antennal insertions glabrous, micropunctate (Figure 10b).Head 0.95 mm wide, 0.55 mm long, very convex in dorsal view, eyes narrowly separated by 2 rows of scales; frons and rostrum carinate from lower 1/3 of eyes to antennal insertions, widening slightly from middle toward apex, from side slightly curved, 1.30 mm long, antennae inserted at basal 1/4.Pronotum 1.30 mm long, 1.75 mm wide at base, lateral margins weakly rounded to distinct anterior collar, in lateral view gibbous at basal 1/3 and strongly rounded-declivous anteriorly, posterior margin rounded anterior to scutellum.Scutellum small, elliptical.
Mesosternum concave, deeply emarginate at posterior margin to receive apex of rostrum with triangular lateral margins, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 weakly convex, 1.20 mm long and somewhat depressed along midline and weakly emarginate at posterior margin, ventrite 2 0.50 mm long along midline, strongly declivous at posterior margin, ventrites 3-5 narrow, subequal in length, ascending.From front, procoxae broadly rounded-triangular without tooth on inner margin.Metafemora with distinct tooth at distal 2/3, fore-and mesofemora with very small tooth at distal 2/3.Genitalia as in Figure 10c.Head 0.95 mm wide, 0.55 mm long, very convex in dorsal view, eyes narrowly separated by 2 rows of scales; frons and rostrum carinate from lower 1/3 of eyes to antennal insertions, widening slightly from middle toward apex, from side slightly curved, 1.30 mm long, antennae inserted at basal 1/4.Pronotum 1.30 mm long, 1.75 mm wide at base, lateral margins weakly rounded to distinct anterior collar, in lateral view gibbous at basal 1/3 and strongly rounded-declivous anteriorly, posterior margin rounded anterior to scutellum.Scutellum small, elliptical.
Mesosternum concave, deeply emarginate at posterior margin to receive apex of rostrum with triangular lateral margins, anterior margin of metasternum declivous.In lateral view abdominal ventrite 1 weakly convex, 1.20 mm long and somewhat depressed along midline and weakly emarginate at posterior margin, ventrite 2 0.50 mm long along midline, strongly declivous at posterior margin, ventrites 3-5 narrow, subequal in length, ascending.From front, procoxae broadly roundedtriangular without tooth on inner margin.Metafemora with distinct tooth at distal 2/3, fore-and mesofemora with very small tooth at distal 2/3.Genitalia as in Figure 10c.Derivation of name: This species is named for Guyane, also known as French Guiana, the overseas department of France in which all specimens have been collected.
Discussion: Philenis guyanensis has a pattern of scales that is similar to that of many Central American species, but is unusually robust, and generally pale reddish-brown, excpt for black triangular areas at the apices of the elytra and black metatibiae.Specimens vary in length from 4.30-4.70mm, (x = 4.51, N = 4).Derivation of name: This species is named for Guyane, also known as French Guiana, the overseas department of France in which all specimens have been collected.
Discussion: Philenis guyanensis has a pattern of scales that is similar to that of many Central American species, but is unusually robust, and generally pale reddish-brown, excpt for black triangular areas at the apices of the elytra and black metatibiae.Specimens vary in length from 4.30-4.70mm, (x = 4.51, N = 4).
Head 0.95 mm wide, 0.30 mm long, rounded-truncate in dorsal view, eyes narrowly separated by 1 row of scales; rostrum not carinate, shallowly transversely depressed at base above antennal insertions, widening slightly from middle toward apex, from side strongly curved, 1.45 mm long, antennae inserted at basal 1/4.Pronotum 1.35 mm long, 1.75 mm wide at base, lateral margins weakly rounded to distinct anterior collar, in lateral view strongly gibbous at basal 1/3 and rounded-declivous anteriorly, posterior margin projecting and rounded-triangular anterior to scutellum.Scutellum small, rounded-rectangular.
Derivation of name: This species is named for its generally dark reddish-brown ground coloration.
Discussion: Philenis ferruginea is one of the more distinct species treated here in being very robust with a reddish-brown ground coloration variegated with black, in the structure of the rostrum, and comparatively simple mesosternum.The type is probably a female.
Head 1.15 mm wide, 0.45 mm long, rounded-truncate in dorsal view, eyes narrowly separated by 2 rows of small semi-erect scales; midline of head from lower 1/4 of eyes to antennal insertions rostrum carinate, polished below antennal insertions, widening slightly at apex, from side slightly curved, 1.55 mm long, antennae inserted at basal 1/3.Pronotum 1.90 mm long, 2.10 mm wide at base, lateral margins weakly rounded' from base to indistinct anterior collar, in lateral view lightly gibbous at base and declivous anteriorly, indistinctly carinate long midline, posterior margin broadly, obtusely triangular and slightly upturned anterior to scutellum.Scutellum small, round.
Mesosternum concave, deeply emarginate at posterior margin to receive apex of rostrum with slightly elevated, narrowly rounded lateral margins, anterior margin of metasternum strongly declivous.In lateral view abdominal ventrite 1 weakly convex, 1.50 mm long along midline, ventrite 20.55 mm long along midline, strongly declivous at posterior margin, ventrites 3-5 narrow, subequal in length, ventrite 5 slightly longer.From front, procoxae broadly oval with large tooth on inner margin.Metafemora with distinct tooth at distal 2/3, mesofemora with weaker tooth beyond middle, profemora with tiny distinct tooth at distal 2/3.
Derivation of name: This species is named in honor of its collector, the late coleopterist Henry Howden.
Discussion: Philenis howdeni is unusual among the species treated here in the genus in being unpatterned and uniformly brownish-red dorsally and black ventrally.
Allotype male.As holotype, except body size 3.80 mm long, 1.90 mm wide.Anterior and posterior elytral fasciae indistinct, possibly abraded.Genitalia as in Figure 10f.Derivation of name: This species is named in honor of Guillermo ("Willi") Kuschel and his extensive study of the Curculionidae, including the Conoderinae, and his residence in South America.
Discussion: The sharp, nearly linear contrast between the dark disc of the pronotum and the white scales of the sides is distinctive.The pattern of scales on the elytra is similar to that of several Central American species, but the uniformly black ventral coloration is not.This is the smallest South American species treated here; specimens vary in length from 3.80-4.60mm, (x = 4.11, N = 3).

Ecology
Hosts: Although nothing is known about the plant hosts of most of the species reported here, Philenis anzaldoi has been cut from a gall on a liana in the Araceae in Panamá, probably in the genus Philodendron Schott, and an adult P. flavipes has been associated with a species of Araceae in Costa Rica.Aroids have a relatively high plant diversity in Neotropical regions.with 778 species in 26 genera known from Central America [9].At least one other genus of conoderine weevils, Hoplocopturus Heller, is associated with species of Xanthosoma Schott in the Araceae (Hespenheide, unpublished), one of which makes galls on an undetermined terrestrial species (Kenji Nishida, unpublished).Several undescribed species are associated with aerial roots of species in the genus Monstera Adanson [10].
Sampling: The Arthropods of La Selva (ALAS) project used a variety of standardized sampling techniques-Malaise, light and pitfall trapping, and canopy fogging-to sample the fauna at La Selva over 11 years [3] and then for several weeks of sampling during one of four years at sites along an altitudinal transect on the slopes of Volcan Barva to the south and west of La Selva.Samples were taken year-round at La Selva and only for several weeks during the dry season at 250-350 m, 450-550 m, 1050-1150 m, and 1450-1550 m along the altitudinal transect.A total of 123 specimens of Philenis
3.1.2.Key to Species of Philenis 1 Pronotum broad with transverse fascia of yellow setae, species more robust in shape; associated with plants in Araceae 2 1A Pronotum with longitudinal stripes of setae, often noticeably narrower than elytra; species more elongate and slender, plant associations unknown 3 Pronotum dorsally with lateral stripes of pale scales on posterior 1 /2 and covered with red scales on anterior 1 /2, elytra simply marked with pale scales along suture and anterior and posterior margins Panamá P. muscamimetica 4A Pronotum dorsally with lateral stripes of pale scales for entire length, some species with medial stripe, elytra marked with transverse and/or oblique bands of scales 5 5 Species essentially all black dorsally and ventrally except pale brown tibiae, scales white dorsally, strong medial stripe on pronotum; Costa Rica P. auritibiae Species lighter brown dorsally and mostly brown ventrally except area black around mesocoxae and abdominal ventrites 3-4, pronotum matte, covered with small scales; Costa Rica and Panamá lateral view, usually conspicuously narrower than elytra at base, metafemoral tooth minute or absent, in lateral view line from eyes to rostrum angulate, size 3.75-4.80mm long, Costa Rica and Panamá