The predatory cheyletid mite, aeletomolpha lepldopterorum (Atari: Cheyletidae) reared on nymphal stages of acarid mite, Trophagus ptrescentiae at three different temperatures (15, 25 and 30 ^°C) and 65 + 5 % R. H. in the laboratory. The tested temperatures showed a noticeable effect on the individually development of Cheletornorpha lepidopteromm •Females of Cheletornorpha lepidopterorum tended to deposit their eggs singly in scattered pattern and covered it by a network of fine webs. The temperature 35 ^°C induced shorter incubation period while at 15 ^°C gave the longest period. Average predator female passed through two nymphal stages while average predator male has only one nymphal age. Both predators limited prey abundance. Cannibalism was usually noticed when the prey was absent or scarce. The raise of temperature from 25 ^°C to 35 ^°C did not show an obvious response on the biology of Chelebxnorpha lepidopterorum. A subequall values of the predator developmental stages and feeding capacity were generally recorded. However, temperature true induced a considerable negative effect on the predator fecundity, as the female laid a total average rate of 85.32,