Key to genera of Neohiraseini from Vietnam

1. Occiput smooth...................................................................................... 2

- Occiput spinose...................................................................................... 4

2. Anterodorsal and posterodorsal carinae of femora armed with fin-like serrations................ Cheniphasma Ho, 2012

- Anterodorsal and posterodorsal carinae of femora lacking dentations or indistinctly waved.......................... 3

3. Preopercular organ in females indistinct, males with slender mesofemora...................... Neohirasea Rehn, 1904

- Preopercular organ in females prominent and complex, males with strongly swollen mesofemora..................................................................................................... Spinohirasea Zompro, 2002

4. Anterodorsal and posterodorsal carinae of femora armed with spines....................... Brockphasma Ho gen. nov.

- Anterodorsal and posterodorsal carinae of femora unarmed............................... Andropromachus Carl, 1913