Notes on the genus <i>Yunnantettix</i> Zheng (Tetrigidae: Cladonotinae), with descriptions of two new species from Thailand.

Two new species, Yunnantettix nanensis sp. nov. and Yunnantettix variabilis sp. nov. are described from Thailand, and current knowledge on their ecology and habits are presented. Generic characteristics of Yunnantettix are updated according to all known species, and a precise key to all known species of the genus is given. Yunnantettix and its allied genera are compared, which clarifies diagnostically valuable characters. Morphology of the wings covered by pronotum is analyzed.