1. Aedeagal shaft (Figures 75, 81) elongate and slender in lateral view, not expanded apically, with basal part greatly extended beyond subgenital plates..... 2

– Aedeagal shaft (Figures 87, 92) relatively short and broad in lateral view, with basal part moderately extended beyond subgenital plates or if not as above then shaft expanded apically (Figure 85).............. 4

2. Postclypeus with lower two-thirds of median keel distinctly dilated laterally resulting in a diamond-shaped, flattened, median area; subgenital plates (Figure 71) with apical spine-like process distinctly longer than expanded basal region; India............... bicarinatus sp. nov.

– Postclypeus (Figures 10, 11) with median keel fully sharp throughout length; subgenital plates with apical spine-like process distinctly shorter than expanded basal region..................... 3

3. Length „ 7.5–8.4 mm, ♀ 7.5–8.5 mm; subgenital plates (Figure 74) joined basally in ventral view; aedeagal shaft (Figure 79) with apical process coiled; SW China (Yunnan, Tibet).......... carinilabratus (Chou and Wu)

– Length „ 5.4–5.5 mm, ♀ 5.6 mm; subgenital plates (Figure 80) slightly separated in ventral view; aedeagal shaft (Figure 81) with apical process sinuate; NE India (E Himalayas), SW China (Tibet)......... himalayensis sp. nov.

4. Fore wings with two transverse fuscous fasciae: one before middle and the other subapical; subgenital plates (Figure 84) evenly tapered from base to apex with expanded basal region narrow and apical spine-like process relatively stout; aedeagal shaft (Figure 85) relatively elongate; Malaysia (northern Borneo: Sabah)................. bifasciatus sp. nov.

– Fore wings without transverse fuscous fasciae........... 5

5. Subgenital plates (Figures 91–93) with expanded basal region very elongate and apical spine-like process short, stout, and dorsally directed in lateral view, not visible in ventral view; northern Borneo....... angulatus sp. nov.

– Subgenital plates not as above............... 6

6. Subgenital plates (Figures 104–106) with expanded basal region and apical spinelike process not abruptly differentiated in ventral view, the latter stout; Malaysia (Sarawak)............... sarawakensis sp. nov.

– Subgenital plates (Figures 88, 95, 100) with expanded basal region and apical spine-like process abruptly differentiated in ventral view; apical spine-like process fine or stout..................... 7

7. Subgenital plates (Figure 88) with apical spine-like process much longer than expanded basal region; Burma......... rangoonensis sp. nov.

– Subgenital plates (Figures 95, 100) with apical spine-like process shorter than expanded basal region.................. 8

8. Subgenital plates (Figure 100) with apical spine-like process fine; aedeagal shaft (Figure 103) similar in width distally in lateral view, subapical process relatively short; southern and central China (Hubei, Gansu, Sichuan, Guizhou,? Jiangxi).................. obsoletus Jacobi

– Subgenital plates (Figure 95) with apical spine-like process stout; aedeagal shaft (Figure 97) expanded apically, subapical spine-like process relatively long; Malaysia (northern Borneo: Sabah)......... sabahensis sp. nov.