Anisopteromalus calandrae(Howard) was reared at constant humidities of 75,56, and 43% RH at 30°C (14.6,12.8 and 11.6% grain moisture content) and a 12:12 (L:D) h photoperiod. Hosts were medium to large larvae of maize weevil,Sitophilus zeamaisMotschulsky, reared on corn. Daily fecundity, sex ratio, adult survivorship, and development time were measured to calculate net reproductive rate (Ro), generation time (T), intrinsic rate of increase (rm), and female adult life expectancy. Development time decreased slightly, but significantly, as humidity increased (from 11.45 ± 0.03 [SE] to 11.91 ± 0.04 d for females and from 10.71 ± 0.04 to 11.13 ± 0.05 d for males). Intrinsic rate of increase tended to increase (from 0.200 ± 0.006 to 0.223 ± 0.006) with humidity (from 11.6 to 14.6% moisture content).