none Adults of A. pallipes (Say), a common parasite of many spp. of Diptera, caged with onion maggot, Delia antiqua (Meigen), readily accepted the larvae as hosts. Onion maggot pupae which resulted were 70% parasitized, averaging 10 parasites per pupa. Parasites emerged without difficulty from onion maggot puparia. Fifteen person h/week were required to produce apprx 150,000 A. pallipes/wk.