Caracteriza？？o morfológica das fases imaturas e tempo de desenvolvimento de Muscidifurax uniraptor Kogan & Legner (Hymenoptera: Pteromalidae)

the immature stages of the parasitoid muscidifurax uniraptor kogan & legner were morphologically characterized. house fly pupae, 48 to 72-hour old, were exposed to adult parasitoids in laboratory conditions (25 ± 1oc, 70 ± 10% r.h. and 14 h of photophase) for 18-hour period. daily, samples of these pupae were dissected for observation of the immatures. measurements of larval cephalic capsules and electromicrographies of the immatures were made with a scanning electron microscope. m. uniraptor presents four instars wich are very similar in shape and motion, but different in size and volume, and presents a gradual loss of transparency. during the egg to adult development, different stages or larval instars occurred simultaneously.