Key to the Chinese species of genus Aulacogenia Stål

1. Humeral angles of pronotum rounded; body length less than 12 mm .........................................................2

-. Humeral angles of pronotum with distinct tubercular processes; body length over 12 mm .......................4

2. Body length over 11.1 mm; posterior angle of each segment of connexivum distinctly protruded in lateral view ................................................................................................................... A. dilatata Cai & Tomokuni

-. Body length less than 11.0 mm; posterior angle of each segment of connexivum not distinctly protruded in lateral view...................................................................................................................................................3

3. Tibia dark except basal portion; body narrower .............................................................. A. corniculata Stål

-. Tibia pale with a darker annulation before middle; body wider ............................... A. errabunda (Distant)

4. Humeral angles of pronotum with tubercular processes ........................................... A. dentata Cai & Zhao

-. Humeral angles of pronotum with papilla-shaped processes.......................................................................5

5. Inner antennal processes distinctly apically reflexed upwards .................................. A. papilla Cai & Zhao

-. Inner antennal processes prostrated and V-shaped separated anteriorly (Figs. 1, 2) ....... A. zhangi sp. nov.