Under laboratory conditions, development of A. bruchphagi (Gahan) from egg to adult on the alfalfa seed chalcid required an average of 10.5 days at 27°C Oviposition began 1-2 days after emergence. An average of 251 eggs was laid by each female over a period of 28 days. Average life span for males and females was 20.7 and 30.4 days, respectively. At 27°C, larval diapause was not induced by photophases of 0, 4, 8, 12, 16, 20, and 24 hours. A lack of synchronization was observed between emergence of overwintering adult A. bruchophagi and the alfalfa seed chalcid, Bruchophagus roddi Gussakovskii, suggesting that alternate hosts are required when seed chalcid larvae are not available in early spring. A. bruchophagi was propagated successfully on 5 unnatural hosts from 3 insect orders: Musca domestica L.: Sarcophaga bullata Parker, Nomia melanderi. Cockerell, Bathyplectes curculionis (Thomson), and Callosobruchus maculatus (F.).