Key to the species of the Domene scabripennis group

1. Antennae moderately slender; antennomere X barely 1.5 times as long as broad. Protarsomeres I-IV strongly dilated. Head flattened, of nearly subcircular shape, and broadest behind eyes (Fig. 36). Whole body blackish.: sternite VIII with pronounced median impression with numerous distinctly modified short and stout black setae, on either side of the posterior excision without cluster of black setae (Fig. 41); aedeagus larger, approximately 1.65 mm long, with bisinuate ventral process (lateral view), and with completely reduced dorsal plate (Figs 42-43). China: Zhejiang (Map 1)...................... ........................................................................................................... D. firmicornis nov.sp.

- Antennae slender; antennomere X nearly twice as long as broad. Protarsomeres I-IV rather weakly dilated. Head less strongly flattened and not of subcircular shape.: sternite VIII with few modified setae at most, on either side of posterior excision with cluster of black setae; aedeagus smaller, approximately 1.15 mm long and with distinct dorsal plate..........................................................................................................................2

2. Posterior margin of abdominal tergite VII without palisade fringe.: sternite VIII as in Fig. 24; aedeagus as in Figs 25-26. China: western Yunnan (Map 1)............................... ........................................................................................................ D. immarginata nov.sp.

- Posterior margin of abdominal tergite VII with palisade fringe.: male sexual characters different..............................................................................................................3

3. Elytra shorter, approximately 0.8 times as long as pronotum. Punctation of head and pronotum coarse.: aedeagus with very slender ventral process. Taiwan ........................4

- Elytra longer, at least approximately 0.95 times as long as pronotum. Punctation of head and pronotum fine.: aedeagus with less slender ventral process. Absent from Taiwan .................................................................................................................................5

4. Legs reddish.: sternite VIII with deeper and slightly narrower posterior excision (Fig. 7); aedeagus as in Fig. 8. Central western Taiwan: Taichung Hsien: Anma Shan (Map 1)................................................................................... D. scabripennis ROUGEMONT

- Legs blackish-brown.: sternite VIII with shallower and broader posterior excision (Fig. 15); aedeagus as in Figs 16-17. Southern Taiwan: Kaohsiung Hsien (Map 1) ............. ............................................................................................................... D. alesiana nov.sp.

5. Head approximately as broad as long (Fig. 28). Elytra approximately as long as pronotum (Fig. 28). Pronotum more oblong, approximately 1.23 times as long as broad (Fig. 28).: sternite VIII and aedeagus as in Figs 32-34. Vietnam (Map 1)........................ .............................................................................................................. D. sagittata nov.sp.

- Head noticeably oblong. Elytra approximately 0.95 times as long as pronotum. Pronotum less oblong, approximately 1.13 times as long as broad. unknown. Laos; China: Guangdong ...................................................................................................... D. sp.