americana (Crawford, 1914)

Type locality: USA, California; (Canada, Alberta? see below).

Additional distribution: USA, Colorado, Idaho, Oregon, Utah, Washington; Canada, Nova Scotia; Mexico.

Host plant: Salix lasiolepis, S. lasiandra .

Remarks: Tuthill (1943) considered the type specimens from California typical and the Alberta specimens as a separate species.

Parasitoids: Prionomitus mitratus (Dalman) .