Key to species of Strophedra in China (based on adults)

1. Termen of forewing without a notch below apex............................................................ 2

- Termen of forewing with a notch below apex.............................................................. 4

2. Forewing apex broadly rounded (Fig. 4)......................................................... S. nigrifusca

- Forewing apex narrowly rounded........................................................................ 3

3. Forewing median fascia silver gray (Fig. 9)........................................................ S. nitidana

- Forewing median fascia violet-leaden (Fig. 7)..................................................... S. quercivora

4. Forewing lacking median fascia (Fig. 8)............................................................ S. magna

- Forewing with median fascia........................................................................... 5

5. Outer edge of ocelloid patch present (Fig. 3)................................................... S. paraspinifera

- Outer edge of ocelloid patch absent...................................................................... 6

6. Costa arched beyond distal 1/4, then oblique to apex (Fig. 5)........................................... S. laticolla

- Costa arched to apex distally (Fig. 6)............................................................ S. tricornuta