Report of the parasitoid wasp, Oomyzus sokolowskii (Hym.: Eulophidae), from Iran

One species of Eulophidae, Oomyzus sokolowskii (Kurdjumov), was collected from larvae of the diamondback moth, Plutella xylostella (L.) (Lep.: Plutellidae). This parasitoid is a major gregarious larval-pupal endoparasitoid of P. xylostella that prefers ovipositing into host larvae but depositing its eggs in host prepupae too. This is the first report of the occurrence of this species from Iran.