Key to species of Nephotettix (modified from Ghauri (1971))

Most specimens can be identified with the help of the following key, but for males, the male genitalic characters should be examined as the final criterion.

1. Crown with black submarginal transverse band markedly and fully developed; if with band partially developed (medially inter- rupted), forewing without black marking (Plate I: A–G; Plate III: A–G; Plate IV: A–B, D–F).......................... 4

- Crown without submarginal transverse band or with band partially developed (medially interrupted) or with traces only behind ocelli; if with band partially developed (medially interrupted), forewing with black markings (Plate II: A–F; Plate V: A–H)...................................................................................................... 2

2. Crown only slightly longer medially than next to eye, its anterior margin only slightly bulging (Plate II: A–F).. N. malayanus

- Crown much longer medially than next to eye, its anterior margin markedly pointed (Plate V: A–H)..................... 3

3. Crown with narrow marginal black band; submarginal black transverse band interrupted in middle................................................................................................................ N. sympatricus

- Crown without traces of marginal and submarginal black transverse bands in both sexes (Plate V: A–H)........ N. virescens

4. Anterior margin of pronotum marked by a black transverse band, sometimes very narrow; if without black transverse band, female sternite VII as in Plate VI: I–L (Plate III: A–G)......................................................... 5

- Anterior margin of pronotum without black markings and female sternite VII not as in Plate VI: I–L (Plate I: A–G; Plate IV: A–B, D–F)........................................................................................... 7

5. Median length of crown only slightly more than its length next to eye........................................ N. afer

- Median length of crown markedly greater than its length next to eye.............................................. 6

6. Marginal black transverse band of crown completely developed between ocelli (Plate III: A–G).................................................................................................................. N. nigropictus

- Marginal black transverse band of crown much reduced, narrow and present only in centre of anterior margin... N. modulatus

7. Anterior margin of crown markedly pointed in centre (Plate IV: A–B, D–F)................................. N. parvus

- Anterior margin of crown rounded in centre (Plate I: A–G)............................................ N. cincticeps