Key to species Toxoneura of the Oriental Region

1. Gena broad, depth below lowest eye-margin just over twice width of postpedicel (Fig. 2). Wing without spot around crossvein dm-cu (Fig. 7) ........................................................................................................................................... T. striata Merz & Sueyoshi

- Gena narrow, depth below lowest eye-margin no over width of postpedicel (Fig. 1). Wing with spot around crossvein dm-cu (Fig. 6) ......................................................................................................................................................................... T. gavryushini sp. n.