Bedellia somnulentella (Z.) is a leaf miner found on hedge bindweed ( Convolvulus sepium L.) in southwestern Virginia from Sept. through Oct. Females maintained at 23.9°C laid an average of 169 eggs, most of them within the 1st 8 days of oviposition. At this temperature, the egg stage averaged 4.5 days with 98.0% hatch, and larval and pupal duration were 13.2 and 5.6 days, respectively. Mean development period from egg to adult was 23.3 days at 23.9°C. Successful completion of the larval stage at this temperature was 98.0%, but only 4.6% at 29.4°C. Adult longevity averaged 22 days for the female and 26 days for the male. Fecundity decreased with increasing sex ratio; ranging from 280 eggs/female at 0.25 (♀/♂) to 110 at 1.25. Four out of 84 field-collected larvae were parasitized by Apanteles bedelliae Vier. No difference was found in the rate of development of B. somnulentella on 9 varieties of sweet potato.