Key to species of the genus Ergatettix Kirby, 1914 from the Indian subcontinent

1. Vertex sufficiently elevated above the pronotum surface; shoulder less wider; third pulvilli a little longer than the second................................................................................................ E. dorsifera

- Vertex less elevated above the pronotum surface, shoulder more wider than the above mentioned; third pulvilli more or less equal to the second.................................................................................... 2

2. Median carina of pronotum behind the shoulders undulate, bearing obtuse crenules; hind process of pronotum with the lateral carinae toward the apex subentires; anterior and middle femora narrow................................. E. interruptus

- Median carina of pronotum behind the shoulder a little undulate; bearing backward subnodulose....................... 3

3. Median carina of pronotum percurrent, little compressed-elevated before the shoulders, little sinuate near the anterior border, between the shoulders and backward gently undulate or substraight..................................... E. crassipes

- Median carina of pronotum slightly interrupted or percurrent, elevated behind the shoulders; lateral carinae with black and yel- low dark band anterior margin to posterior margin............................................................ 4

4. Pronotum lateral view wave like................................................................ E. undunotus

- Pronotum lateral view without wave like................................................................... 5

5. Pronotum having the prozonal carinae high and thicker, faintly diverging posteriorly and the medial carina distinct, slightly humped between sulci....................................................................... E. panchtharis

- Pronotum having the prozonal carinae sharp, parallel in front, little converging behind, and the medial carina sharp, slightly undulating throughout, distinctly convex between shoulders.................................................... 6

6. The head strongly exerted and pronotum strongly reduced............................................. E. elevates

- The head slightly exerted and pronotum not reduced.......................................................... 7

7. Tegmina and wings greatly reduced............................................................... E. minutus

- Tegmina and wings developed........................................................................... 8

8. Frontal costa bifurcation starts in about ¼ the compound eye height; posterior angle of lateral lobes of pronotum turned downwards, a little broadened, apex obtusely rounded, flattened............................................. E. callosus

- Frontal costa bifurcation starts at the level of upper margin of compound eyes, posterior angle of lateral lobes of pronotum turned downwards, a little broadened, apex subtruncate, narrow.............................. E. subtruncatus sp. nov.