Key to adults of Dorypteryx

1. Forewing with only three longitudinal veins ................................................................................................................ 2

–. Forewing with five longitudinal veins .......................................................................................................................... 3

2. Forewing proximally with R and M fused for a short distance; R terminated at midlength of costal margin ............... ................................................................................................................................................................. pallida Aaron

–. Forewing proximally with R and M not fused for a distance; R terminated at about distal 1/4 of costal margin.......... ...................................................................................................................................................... longipennis Smithers

3. Female epiproct subtrapezoidal; gonapophyses broad, nearly quadrate ....................................... domestica (Smithers)

–. Female epiproct subtriangular; gonapophyses narrow, subtriangular .............................................. yunnanica sp. nov.