Odontepyris sp. nov., a new ectoparasitoid on the caterpillar of Telorta divergens (Butler, 1879) (Lepidoptera: Noctuidae), is recognized from Korea. After rearing the larvae on the host insect, adult females were obtained and described. Revising all known species of genus Odontepyris, a key to the species of the genus Odontepyris is presented for the Eastern Palearctic region.