Key to the genera Leuconemacris, Asulconotoides, Asulconotus and Ptygonotus

1. Hind margin of pronotum with a small notch; tegmina abbreviated but dorsally touching each other in male, or laterally scalelike in female........................................................................................ 2

–. Hind margin of pronotum with a large triangular notch; tegmina lanceolate and lateral in both genders.................. 3

2. Hind transverse sulcus on dorsum of pronotum distinct........................................... Leuconemacris

–. Hind transverse sulcus on dorsum of pronotum absent............................................. Asulconotoides

3. Vertex roundly swelling with indistinct median carina; hind transverse sulcus on dorsum of pronotum absent.... Asulconotus

–. Vertex weakly depressed with distinct median carina; hind transverse sulcus on dorsum of pronotum distinct..... Ptygonotus