none Infection of Diacrisia obliqua larva by Apanteles flavipes resulted in a significant decrease in the lipid and protein content of the host. In about 8 days the parasitoid larvae developing in the host not only utilized these components of the host but also depressed food consumption of the host Consequently, at the time of emergence of the parasitoid larvae, the host tissue consisted of simply carcass. The parasitoid larvae utilized lipids at the rate of 0.9-10.0 mu g/mg/day. Biochemistry; Chemical composition; Nutrition; Diet; Life cycle and development; Development; Growth; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships Diacrisia obliqua (Arctiidae); Calorific value; Carbohydrate content; Lipid and fatty acid content; Protein content; Quantity of food consumed; Growth rate; Hymenopteran parasite effect; Hymenopteran parasites; Apanteles flavipes; Host growth, ingestion & chemical composition relationships; Reaction of host to parasite; Growth, ingestion & chemical composition responses to Hymenoptera Apanteles flavipes (Braconidae); Lepidopteran hosts; Diacrisia obliqua; Host growth, ingestion & chemical composition relationships; Reaction of host to parasite; Growth, ingestion & composition of Diacrisia obliqua (Lepidoptera)