Peridinetus

Prena, Jens, 2010, The Middle American species of Peridinetus Schönherr (Coleoptera: Curculionidae: Baridinae), Zootaxa 2507, pp. 1-36 : 6-7

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