Key to the species of the Corynoptera vagula complex

1. Two basalmost megasetae of gonostylus close to each other, arising from common basal body (Figs. 1 B, D; 3D) ........................................................................................ 2

­ Two basalmost megasetae of gonostylus not especially close to each other nor arising from common basal body (e.g., Fig. 2 B) ...................................................................... 3

2. Two basalmost megasetae situated on apical half of gonostylus, tegmen subquadrangular, intercoxal area of hypopygium not modified, normally setose (Fig. 1)................ .......................................................................................................... vagula Tuomikoski

­ Two basalmost megasetae situated at middle of gonostylus, tegmen broader than high, intercoxal area of hypopygium slightly elongated, mesially densely setose (Fig. 3 D, E) ................................................................................................................ fratercula sp. n.

3. Gonostylus club­shaped, broadest subapically, tegmen subquadrangular, tibial apex without prolateral comb (Figs. 3 A, B; 6A) ............................................. armigera sp. n.

­ Gonostylus broadest at middle, tegmen broader than long, tibial apex with subapical comb (Fig. 2)................................................................................................................. 4

4. Gonostylar megasetae 9 in number, length of longest ones about 1/4 of greatest width of gonostylus ............................................................................. nyxa Mohrig & Menzel

­ Longest gonostylar megasetae 5 or 6 in number, length of longest ones 1/3–1/2 of greatest width of gonostylus.......................................................................................... 5

5. Basal antennal flagellomeres and their setae long (Fig. 5 A), tibial apex with 6 modified setae in uneven comb (Fig. 6 B), wing length 1.7 mm ........... fera Mohrig & Heller

­ Basal antennal flagellomeres and their setae shorter (Fig. 6 D), tibial apex with comb of 3 setae (Fig. 6 E), wing length 1.1 mm ................................................ robustior sp. n.