none Galleria mellonella; SIZE-; Larva, hymenopteran parasite fecundity & sex ratio response relationships; HYMENOPTERAN-PARASITES; Bracon hebetor; Parasite development & effects of host larva size on parasite biology Bracon hebetor; REPRODUCTIVE-PRODUCTIVITY; Average production & effects of lepidopteran host size; DEVELOPMENT-; Total development time, stage duration & adult longevity, lepidopteran host; LEPIDOPTERAN-HOSTS; Galleria mellonella; Development & effects of host larva size on fecundity & progeny sex ratio; MORTALITY-; Developmental stages; POPULATION-SEX-RATIO; Progeny, lepidopteran host size relationships; SURVIVAL-; Egg to adult survivorship Bracon hebetor (Say) is a gregarious larval ectoparasitoid which was reared at 25 +- 2 degree C and 55-60 % R.H. conditions on the greater Wax Moth, Galleria mellonella L. An average, of 12.0 days was required for completion of its development from egg to adult. The eggs were hatched within 2-3 days after oviposition. Larval and pupal stages were completed within 2-3 and 6-9 days, respectively. Survival from egg to adult was about 24%. The highest death percentage occurred at the larval stage. Under the laboratory conditions, the mean adult longevities of the mated females and males were 13.3 and 10.2 days, respectively. In the oviposition period, the mean total production of progeny was 16.5 adults, and 62% of these were females. The change in host-larval size did not produce an important effect on the progeny production of females. However, it did have some effect on the sex-ratio.