Identification key to the species of Pyrops of Vietnam, Laos, Cambodia and Southern Continental China

1. Cephalic process strongly inflated apically (Figs 9–11) ................................................................... 2

– Cephalic process not strongly inflated apically (Figs 12–19) ........................................................... 3

2. Abdomen black ventrally (Fig. 9B); tegmina pale yellow-white on disc and with 3 black spots in costal area before nodal line (Fig. 9A); cephalic process yellow (Fig. 9) .......................................... ........................................................................................................ Pyrops atroalbus (Distant, 1918)

– Abdomen red ventrally (Figs 10B, 11B); tegmina largely black on disc (Fig. 10A), or in the pale forms, bluish white on disc and without black spots in costal area (Fig. 11A, F); cephalic process red-brown to black (Figs 10–11) ................................................. Pyrops clavatus (Westwood, 1839)

3. Head entirely green, hind wings bright yellow basally or entirely yellow-orange (Figs 12–13) ..... 4

– Head not entirely green, hind wings yellow, white or blue basally (Figs 14–19) ............................ 5

4. Hind wings bright yellow with apical third black (Fig. 12A); ground colour of distal half of tegmina black (Fig. 12A); anterior and median legs largely black (Fig. 12A–C) ............................................ ................................................................................................ Pyrops viridirostris (Westwood, 1848)

– Hind wings entirely bright yellow-orange (Fig. 13A); ground colour of distal half of tegmina green (Fig. 13A); anterior and median legs green (Fig. 13A–C) ............ Pyrops itoi (Satô & Nagai, 1994)

5. Cephalic process black or brown-black dorsally, yellowish ventrally (Figs 4–5, 14–15); pro- and mesonotum with median black or dark brown markings (Figs 4–5, 14–15) .................................... 6

– Cephalic process yellow-red to red-brown dorsally, paler, yellow to dark red ventrally (Figs 16–19); pronotum unicolourous, mesonotum sometimes with small brown-black markings on sides (Figs 16– 19) ..................................................................................................................................................... 8

6. Apex of cephalic process coloured like the rest of the process (Figs 4–5, 15) ................................. 7

– Apex of cephalic process yellow to orange-red, strongly contrasting (Figs 6–7, 14) ........................ ............................................................................................................ Pyrops lathburii (Kirby, 1818)

7. Tegmina narrower: LTg/BTg = 2.9 (Figs 4A, 5A); spots on basal half of tegmina not fused into bands (Figs 4A, 5A); cephalic process narrower (LPr/BPrH> 9) (Figs 4–5); hind wings bright yellow (Fig. 4A) or white basally (Fig. 5A) ...................................... Pyrops condorinus (Lallemand, 1960)

– Tegmina broader: LTg/BTg = 2.53 (Fig. 15A); spots on basal half of tegmina fused into transverse bands (Fig. 15A); cephalic process broader (LPr/BPrH <8) (Fig. 15); hind wings always bright yellow basally (Fig. 15A) ....................................................................... Pyrops spinolae (Westwood, 1842)

8. Hind wings white with sutural margin bordered with black up to the anal lobe (Fig. 1A); cephalic process very narrow (LPr/BPrH = 19) (Fig. 1) ............................................ Pyrops buomvoi sp. nov.

– Hind wings white, bright yellow or blue with only apical third black (Figs 16A, 17A, 18A, 19A); cephalic process broader (LPr/BPrH <10) (Figs 16–19) ................................................................. 9

9. Hind wings bright yellow basally (Fig. 16A); cephalic process bright red, yellow ventrally (Fig. 16); yellow spots on membrane of tegmina (Fig. 16A) ......................... Pyrops candelaria (Linné, 1758)

– Hind wings white or blue basally (Figs 17A, 18A, 19A); cephalic process dark red-brown and dark red ventrally or dark red, orange ventrally and at apex (Figs 17–19); yellow spots on membrane of tegmina (Figs 18–19) or not (Fig. 17) ............................................................................................ 10

10. Tegmina without yellow spots on membrane (Fig. 17A); cephalic process dark red, orange ventrally and at apex (Fig. 17); hind wings pale blue to white basally (Fig. 17A); basal half of tegmina whitish with white-margined green spots in transverse rows, sometimes fused in bands (Fig. 17A) ............................................................................................... Pyrops ducalis (Stål, 1863)

– Tegmina with yellow spots on membrane (Figs 18A, 19A); cephalic process dark red-brown, dark red ventrally (Figs 18–19); hind wings white or blue basally; basal half of tegmina dark green or dark blue-green with yellow spots (Figs 18A, 19A) ................................................................................11

11. Hind wings blue basally (sometimes faded to nearly white in collections specimens) (Fig. 18A); cephalic process very elongate and strongly curved dorsad (Fig. 18); ground colour of tegmina dark blue-green (Fig. 18A) ....................................................................... Pyrops coelestinus (Stål, 1863)

– Hind wings white basally (Fig. 19A); cephalic process very elongate and curved dorsad (Fig. 19); ground colour of tegmina green (Fig. 19A) .................................... Pyrops vitalisius (Distant, 1918)