Key to species of Pisacha Fennah

1. Tegmina transparent, with two fuscous markings........................................................... 2

-. Tegmina transparent, without any stripe.................................................................. 3

2. Frons with median carina pale yellow.................................................... P. naga Distant, 1906

-. Frons with median carina black......................................................... P. yinggensis sp. nov.

3. Costal membrane of tegmen with 9 or 10 short transverse veinlets widened into bands............ P. balteiformis sp. nov.

-. Costal membrane with transverse veinlets not widened...................................................... 4

4. Frons with “V” lateral carinae unclear but incrassate at base......................... P. kwangsiensis Chou et Lu, 1977

-. Frons with “V” lateral carinae have uniform thickness....................................................... 5

5. Vertex with anterior margin acutely convex medianly...................................... P. baculiformis sp. nov.

-. Vertex with anterior margin slightly obtusely convex or straight............................................... 6

6. Vertex with anterior margin slightly obtusely convex, mesonotum with lateral carinae surpassing apical half.................................................................................................... P. falcata sp. nov.

-. Vertex with anterior margin straight, mesonotum with lateral carinae obsolete at apical fifth...................................................................................... P. encaustica (Jacobi, 1916), comb. nov. & stat. rev.