none Apanteles ruficrus (Haliday), a gregarious braconid parasitoid, was reared from Chrysodeixis argentifera collections taken in Queensland, Australia, and imported into the United States, where laboratory studies were conducted to determine its basic biology. A. ruficrus prefers 3-day-old larvae of the soybean looper, Pseudoplusia includens Walker, and develops in the cabbage looper, Trichoplusia ni Huebner, and the fall armyworm, Spodoptera frugiperda (J. E. Smith). It attacks at least four other lepidopterous larvae. Mean developmental time from oviposition to larval emergence is 13.2 days at 28 degree C. Pupal development time ranges from 3 to 6 days. Mated adult males and females live about 20 and 18 days, respectively, whereas nonmated males live 18 days and females 20 days.