Key to Female Peltonotus Species
(Females of P. deltamentum and P. karubei are not known)
1. Apical half of mentum acute, triangulate (Figs. 19, 28) ................................................. ................................................................................... P. sisyrus Jameson & Wada, n. sp.
1'. Apical half of mentum rounded (Figs. 20–23, 25–27) or quadrate (Fig. 24)................ 2
2. Apex of labrum bilobed (Figs. 16–17).......................................................................... 3
2'. Apex of labrum broadly emarginate (Figs. 15, 18) to deeply, narrowly emarginate (Fig. 14) ................................................................................................................................. 4
3. Epipleuron as in Fig. 56 .................................................................. P. morio Burmeister
3'. Epipleuron as in Fig. 57 ....................................................................... P. nasutus Arrow
4. Elytra reddish with castaneous vittae (Figs. 12–13) ............................ P. vittatus Arrow
4'. Elytra entirely castaneous, reddish, or black (lacking vittae) ....................................... 5
5. Labrum with apex deeply, narrowly emarginate (e.g., Fig. 14) .................................... 6
5'. Labrum with apex broadly emarginate (e.g., Figs. 15, 18) ......................................... 10
6. Epipleuron simple, not emarginated in ventral view (Fig. 58)........................................ .................................................................................... P. nethis Jameson & Wada, n. sp.
6'. Epipleuron emarginated in ventral view (e.g., Fig. 51)................................................. 7
7. Maxillary stipes with setae curly at apex (e.g., Fig. 30) ............................................... 8
7'. Maxillary stipes with setae straight, not curly at apex .................................................. 9
8. Epipleural emargination with welldeveloped tooth in ventral view (Fig. 51) ............... ............................................................................................. P. brunnipennis Benderitter
8'. Epipleural emargination with moderately developed tooth in ventral view (Fig. 53) .... .......................................................................... P. gracilipodus Jameson & Wada, n. sp.
9. Epipleural expansion welldeveloped in dorsal view (ventral view shown in Fig. 63) .. ......................................................................... P. suehirogarus Jameson & Wada, n. sp.
9'. Epipleural expansion moderately developed in dorsal view (ventral view shown in Fig. 53) .................................................................... P. podocrassus Jameson & Wada, n. sp.
10. Epipleuron broad at base, lacking emargination (Fig. 59); occurring in Northeast India (Fig. 65) ............................................................................................ P. pruinosus Arrow
10'. Epipleuron narrow at base, with or without emargination; occurring in Borneo (Figs. 65, 66, 67) ................................................................................................................... 11
11. Labial palpomere 2 greatly enlarged and dorsoventrally flattened, 2–3 times wider than palpomere 1 (e.g., Fig. 22) .................................................................................. 12
11'. Labial palpomere 2 not greatly enlarged and flattened, at most 1.5 times wider than palpomere 1 (e.g., Fig. 27) .......................................................................................... 13
12. Maxillary stipes with setae curly at apex (Fig. 30); epipleural expansion welldeveloped in dorsal view (ventral view shown in Fig. 55) ..................... P. malayensis Arrow
12'. Maxillary stipes with setae straight, not curly at apex; epipleural expansion moderately developed in dorsal view (ventral view shown in Fig. 53) ............................................. ................................................................................. P. silvanus Jameson & Wada, n. sp.
13. Body length more than 2 cm; epipleuron simple, not emarginated in ventral view (Fig. 54) ................................................................................ P. kyojinus Jameson & Wada, n. sp.
13'. Body length less than 2 cm; epipleuron simple or emarginated in ventral view (Figs. 52, 60–61) ................................................................................................................... 14
14. Epipleuron emarginate in ventral view (Fig. 61) ........................................................ 15
14'. Epipleuron simple in ventral view (Fig. 52, 60) ......................................................... 16
15. Epipleuron with round emargination in ventral view (Fig. 61); occurring in Sabah region (Fig. 67) ...................................................................................... P. similis Arrow
15'. Epipleuron with oval emargination in ventral view; occurring in Mt. Bawang, Kalimantan region (Fig. 67) ................................ P. adelphosimilis Jameson & Wada, n. sp .
16. Epipleuron (ventral view) terminating near metacoxa (Fig. 60) ..................................... ................................................................................... P. rubripennis Miyake & Yamaya
16'. Epipleuron (ventral view) extending posterior of metacoxa, terminating near sternite 3 (Fig. 52) .................................................................... P. fujiokai Jameson & Wada, n. sp.