The alfalfa weevil complex, comprised of the Egyptian alfalfa weevil (EAW), Hypera brunneipennis and alfalfa weevil, Hypera postica, is the most damaging arthropod complex in California alfalfa. Feeding by weevil larvae can cause severe defoliation in an alfalfa field significantly reducing yields. Although the weevil is well controlled with insecticides such as organophosphates and carbamates, the occurrence of insecticides in surface waters has placed added emphasis on finding alternative means to manage this pest. Pyrethroid insecticides and indoxacarb were recently registered in alfalfa but have drawbacks of being non-selective for natural enemies and pose additional environmental concerns. Biological control by parasitic hymenoptera has been effective in reducing chemical applications against the H. postica in many other alfalfa-growing regions in the U.S. A considerable amount of work was done concerning alfalfa pest management in California until the mid 1980’s, but research efforts have declined over the last 20 years. Ten species of parasitoids were released as possible biological control agents from 1957-1988; three were reported as established or recovered from studies conducted by Pitcairn (1989). Our study, conducted from February to June of 2004, focused on nine sites throughout California to sample for the presence of these previously released parasitoids. To date, three larval stage parasitoids, Bathyplectes anurus, B. curculionis and Tetrastichus incertus have been recovered from our field sites, but percent parasitism appears to be low. Studies are ongoing to further assess the level of parasitism in selected field sites.