Phanerotoma noyesi Zettel (Hymenoptera: Braconidae) is a solitary, arrhenotokous, egg-larval, endo-parasitoid of Diaphania pulverulentalis (Hampson) (Lepidoptera: Pyralidae). Studies on the biology of P. noyesi were conducted in the laboratory at 25[plus/minus]1[degree]C RH 70-80% and are reported here. The duration of egg stage was 21-24 hrs. There were three larval instars; the duration of I, II and III instars were 8-9, 1-2 and 3-4 days, respectively. The pre-pupal period was two days and pupal period was 7-8 days. The mean developmental period from egg to adult was 22-26 days. There was no pre-oviposition period. The sex-ratio was 1:1.84 (male:female). Adult longevity was studied using five types of diets. Adult longevity was similar for mated male and female P. noyesi. none