Key to the males of the genus Dryodurgades Zachvatkin in China

1. Aedeagal shaft cylindrical, apex with one pair of laterally and then ventrally directed processes... D. formosanus (Matsumura)

- Aedeagal shaft compressed, apex with at least two pairs of variously directed processes................................ 2

2. Aedeagal shaft twisted in dorsal view......................................................... D. tortilis sp. nov.

- Aedeagal shaft not twisted................................................................................ 3

3. Apex of aedeagal shaft with two pairs of bifurcate processes directed ventrally...................... D. lamellaris Vilbaste

- Apex of aedeagal shaft with two pairs of processes directed laterally, apical pair bifurcate and near parallel, subapical pair not bifurcate.......................................................................... D. dentistylus Zhang & Li