none Peridroma saucia; DEVELOPMENT-; Temperature relationships; HYMENOPTERAN-PARASITES; Meteorus communis; Temperature dependent development of parasite & comparison with host, USA; TEMPERATURE-; Development relationships; OREGON-; West; Temperature dependent development, comparison with hymenopteran parasite Meteorus communis; DEVELOPMENT-; Temperature relationships, comparison with lepidopteran host; LEPIDOPTERAN-HOSTS; Peridroma saucia; Temperature dependent development & comparison with host; TEMPERATURE-; Development relationships & comparison with lepidopteran host; OREGON-; West; Temperature dependent development & comparison with lepidopteran host Development of a parasitoid, Meteorus communis (Cresson), was compared at 8 constant temperatures, while reared on a noctuid host, the variegated cutworm, Peridroma saucia (Hubner), fed a standard artificial diet. Development from oviposition to adult emergence ranged from 15.7 d at 28 degree C to 61.8 d at 14 degree C. The temperature requirement for development from egg to exit of the parasitoid larva (3rd instar) from the host was 143 +- 9.9 DD above a developmental threshold of 10.3 +- 0.6 degree C. Development from the 3rd instar to adult emergence required 132 +- 5.4 DD above a developmental threshold of 8.3 +- 0.4 degree C. Overall, development from egg deposition to adult emergence required 274 +- 14.5 DD above a developmental threshold of 9.5 +- 0.5 degree C. The development of M. communis was compared with 3 populations of P. saucia for 3 temperatures.