Key to females of Ooencyrtus protohermesis -group

1 Ovipositor sheath more than 0.8× as long as mid tibia......................................................... 2

- Ovipositor sheath at most 0.6× as long as mid tibia........................................................... 3

2 Hind femur dark brown........................................................... O. yoshidai Noyes & Hirose

- Hind femur yellow.................................................................... O. longicauda sp. n.

3 Antenna with scape more or less flattened, less than 4× as long as broad........................ O. protohermesis sp. n.

- Antenna with scape cylindrical, about 6.3× as long as broad........................................ O. noyesi sp. n.