Key to the Indian species of the genus Tridactylus Olivier, 1789

1. Hind wings shorter, extending over the end of abdomen slightly, body size small, length of body 5.0– 5.2 mm ............................... ................................................................................................................................................................................. Tridactylus major

- Hind wings longer, extending over the middle of hind tibiae distinctly, body size large, length of body 7.0– 7.4 mm .................... 2

2. Hind wings shorter, not reaching the end of hind tibiae, pronotum strongly transverse and convex, lateral lobe of pronotum rounded, carinae from eye to vertex absent, hind tibiae with 2 internal and 3 external articulated lamellae...................................... ....................................................................................................................................................... Tridactylus bijakherensis sp. nov.

- Hind wings longer, almost reaching the end of hind tibiae, pronotum slightly transverse and concave, lateral lobe of pronotum