The parasitic waspPediobius foveolatus(Crawford), was successfully reared in the laboratory onEpilachna varivestisMulsant. The feasibility of maintaining overwintering stocks of this parasite was demonstrated. The optimum parasite-host ratio used in terms of adult parasites produced/host larvae was 0.4:1. Reproductive capacity of adult ♀ diminished with age, and those held for longer than 90 days at 13°C failed to successfully reproduce. The optimum age for reproduction was less than 12 days.