Larvae of A. citrinopsis Dyar were found feeding on leaves of castor-bean platns (Ricinus communis L.) on plantations at Caiua, Tupi Paulista, Junqueiropolis, Ouro Verde, Maraba Paulista and Candido Rodrigues, in the State of Sao Paulo, Brazil. The larvae feed on the lower surface of leaves, were they form cocoon and pupate later on. Only at Junqueriopolis the infestation was high, but there was a natural decrease in the insect population. The hymenopterous Glyptapanteles dalosoma Santis, 1987 (Braconidae), Ceratosmica argentina Blanchard, 1942 (Chalcididae) and Isdromas monterai (Costa Lima, 1948) (Ichneumonidae) were reared from larvae; the latter two probably behaved as hyperparasites. none