none no species Pest larvae of different instars were collected from the field at weekly intervals and reared in the laboratory on the natural foods. From the pest larvae collected from mid-August to mid-November, the full-grown grubs of a parasitoid were isolated. Usually one parasitoid grub came out from the body of one parasitized pest larva and underwent pupation within 5-10 hr. Growth of parasitized larvae was reduced by 2 to 5 times. Adult parasitoids of brownish colour emerged within 4-6 days and were slender wasps having long antennae. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Land and freshwater zones; Oriental region Diacrisia obliqua (Arctiidae); Hymenopteran parasites; Meteorus; New host record for India; India; Muzaffarpur; New hymenopteran parasite record for India Meteorus (Braconidae); Lepidopteran hosts; Diacrisia obliqua; New host record for India; India; Muzaffarpur; New lepidopteran host record for India