Key to the Middle American species of Peridinetus 1 Shape of pronotum subconical, greatest width at base; elytral interstriae without median, longitudinal ridge .......... 2 - Pronotum subparallel in basal half or constricted toward base; if shape indistinctly conical, then at least some inter- striae with median, longitudinal ridge ......................................................................................................................... 9 2 Elytra subtriangular, sides evenly converging from noticeably protruding humeri to apical fourth (Fig. 11); hind tibia with apical tooth long and perpendicular to long axis ................................................................................................ 3 - Elytra subovate, with humeri less protruding and sides rather gently converging; hind tibia with apical tooth moderate and oblique ........................................................................................................................................................... 4 3 Elytron with ill-defined pattern of light-colored setae in apical half and on flank; ventrite 1 glabrous ........................ ......................................................................................................................................... 1. P. m e l a s t o m a e Champion - Elytron with 3 well-defined fasciae of light-colored setae; ventrite 1 laterally with setae 2. P. trifasciatus Champion 4 Elytron with basic vestiture of black setae in addition to yellow macula ................................................................... 5 - Elytron either glabrous with yellow macula or with basic vestiture of light grey setae ............................................. 6 5 Each elytron with 1 median macula of yellow setae (Fig. 13, 14); total length 4.8–6.1 mm ....... 3. P. notabilis sp. n. - Elytra with single, subapical macula of yellow setae (Fig. 15, 16); total length 3.6–4.2 mm ......... 4. P. pictus Kirsch 6 Basal vestiture uniformly grey, with black maculae below subapical callosity and in distal portion of sutural interstria, ventrites with setae (Fig. 17, 18) ....................................................................................... 5. P. c a n u s Champion - Basal vestiture microscopic, pronotum and elytron with well-defined maculae of light-colored setae, ventrites glabrous ............................................................................................................................................................................ 7 7 Integument rufous, metepisternum and flank of metasternum glabrous (Fig. 19, 20) .................... 6. P. rubens sp. n. - Integument black, metepisternum and flank of metasternum with light-colored setae ............................................. 8 8 Elytron with whitish median and apical fasciae (Fig. 21, 22); Honduras to Ecuador ............... 7. P. cretaceus Pascoe - Elytron with whitish median fascia, apical fascia absent (Fig. 23, 24); Mexico, Guatemala and Belize ...................... .............................................................................................................................................. 8. P. distinctus Champion 9 Elytral interstria 7 usually with continuous median ridge between humerus and subapical callosity; if ridge incomplete, then interstria 9 with ridge ............................................................................................................................... 10 - Elytral interstria 7 usually without continuous median ridge; if ridge incomplete, then interstria 9 without ridge .. 20 10 All elytral interstriae ridged at least distally ............................................................................................................. 11 - Only odd-numbered interstriae ridged distally .......................................................................................................... 12 11 Elytron with conspicuous fascia of yellow, imbricate setae near declivity; pronotal flank with few ochreous setae (Fig. 25, 26); Mexico and Guatemala .................................................................................... 9. P. costatus Champion - Elytron with inconspicuous fascia of whitish, widely spaced setae near declivity; pronotal flank densely covered with ochreous setae (Fig. 27, 28); Costa Rica and Panama ........................................................... 10. P. odone sp. n. 12 Anterior portion of pronotum with red setae; elytron with uniform vestiture of khaki and some white setae, scutellar area black with pair of white striae ............................................................................................................................ 13 - Anterior portion of pronotum with brown, white or without setae; elytral vestiture mottled, flank white (Fig. 29, 30) ............................................................................................................................................ 11. P. irroratus (Fabricius) 13 Size larger (5.0– 8.1 mm); both sexes with base of rostrum depressed and frontal fovea deep, male with fringe of long hairs on ventral edge of metatibia; prosternal channel without plumose setae ................. 12. P. imperialis sp. n. - Size smaller (2.7–4.8 mm); male with base of rostrum depressed and frontal fovea shallow, metatibia without conspicuous fringe of hairs; female with transition between head and rostrum continuous, frontal fovea absent; prosternal channel with plumose setae .................................................................................................................................. 14 14 Pronotal disk punctate, median carina glabrous, red setae covering apical one-half (Fig. 33); elytral flank with spot of white setae above metepisternum (Fig. 34); rostrum not thicker than femora; female frons with raised comb of setae (Fig. 43); total length 2.7–4.4 mm .................................................................................... 13. P. wyandoti sp. n. - Pronotal disk microreticulate, punctures inconspicuous, median carina dull if present, red setae covering apical onethird; elytral flank with or without spot of white setae above suture between ventrites 1 and 2; rostrum thicker than femora; female frons without raised comb of setae; total length 3.3–4.8 mm .......................................................... 15 15 Frons with shallow depression (Fig. 41); rostrum without fine dorsal groove; male ............................................... 16 - Frons convex; rostrum with fine dorsal groove near base or middle (Fig. 42, 44, 45); female ................................ 18 16 Elytral flank without patch of white setae above ventrites 1 and 2 (Fig. 36); pronotum laterally without patch of raised setae (Fig. 35); antenna inserted near distal fourth; Panama ...................................... 14. P. illabes sp. n. (part) - Elytral flank usually with patch of white setae above ventrites 1 and 2 (Fig. 38, 40); pronotum laterally with patch of raised setae (Fig. 37, 39); antenna inserted more basally; Nicaragua to Panama ..................................................... 17 17 Interstria 7 with median ridge evenly curved throughout; interstria 5 without white setae in front of ridge; elytral flank with white, in lateral view usually horizontal spot on interstriae 9 and 10 (Fig. 38) ........................................... ....................................................................................................................................... 15. P. l a e t u s Champion (part) - Interstria 7 with median ridge more curved in apical half and separated from distal section by angular depression; interstria 5 often with white setae in front of ridge (Fig. 39); elytral flank with white, in lateral view usually vertical spot on interstriae 8 to 10 (Fig. 40) ......................................................................................... 16. P. p e n a sp. n. (part) 18 Rostrum with dorsal groove near base, approximately at apex of scape in repose (Fig. 42), groove with setae usually visible in lateral view; pronotum laterally with patch of raised setae ............................ 15. P. l a e t u s Champion (part) - Rostrum with dorsal groove in middle third (Fig. 44, 45), groove without setae; pronotum laterally with or without raised setae ................................................................................................................................................................ 19

Published as part of Prena, Jens, 2010, The Middle American species of Peridinetus Schönherr (Coleoptera: Curculionidae: Baridinae), pp. 1-36 in Zootaxa 2507 on pages 6-7, DOI: 10.5281/zenodo.195971