Thirty-nine species of parasitoids were identified from 12 species of lepidopterous pests on peanuts in Oklahoma. Important parasitoids ofElasmopalpus lignosellus(Zeller) wereOrgilus elasmopalpiMuesebeck (1.6% parasitism),Pristomerus spinator(F.) (0.8%), andInvreia mirabilis(Boucek) (0.8%). Parasitoids not previously reported fromE. lignosellusincludeP. spinator,I. mirabilis,Spiloehalcis sanguiniventris(Cresson),Spilochalcis flavopicta(Cresson),Chelonus texanus(Cresson),Mieropletis croceipes(Cresson), andApantelessp. The major parasitoids ofHeliothis zea(Boddie) wereMicropletis croceipes(Cresson) (20.8%) andEucelatoria armigera(Coquillett) (10.0%). Important parasitoids ofStegasta bosqueella(Chambers) wereOrgilus modicusMuesebeck (11.1%) andChelonus(Microchelonus) sp. (3.4%).S. bosqueellais a new host record forO. modicus,Diadgma compressum(Cresson),Orgilus walleyiMuesebeck,Macrocentrus ancylivorusRohwer,M. croceipes, andI. mirabilis.