Parasitization of the Mexican bean beetle (MBB),Epilachna varivestis, by the waspPediobius foveolatuswas monitored in five urban vegetable gardens in Washington, D.C., in 1979 and 1980. We innoculated all five gardens withP. foveolatusin 1979 and one of these gardens in 1980. This wasp is an exotic, non-overwintering biocontrol agent that is used in Maryland soybean fields. Our innoculative releases,P. foveolatusthat probably came from Maryland, or both parasitized from 97 to 100% of the MBB larvae in each garden by late summer. Therefore, most of the MBB damage m these urban gardens probably could be eliminated by making innoculative releases of adequate numbers ofP. foveolatusthroughout gardens at appropriate times.