Tachygyna Chamberlin & Ivie, 1939

Tachygyna alia Millidge, 1984

Tachygyna cognata Millidge, 1984

Tachygyna coosi Millidge, 1984

Tachygyna delecta Chamberlin & Ivie, 1939

Tachygyna exilis Millidge, 1984

Tachygyna gargopa (Crosby & Bishop, 1929)

Tachygyna haydeni Chamberlin & Ivie, 1939

Tachygyna pallida Chamberlin & Ivie, 1939

Tachygyna proba Millidge, 1984

Tachygyna sonoma Millidge, 1984

Tachygyna speciosa Millidge, 1984

Tachygyna tuoba (Chamberlin & Ivie, 1933)

Tachygyna ursina (Bishop & Crosby, 1938)

Tachygyna vancouverana Chamberlin & Ivie, 1939