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Two cuckoo wasp species (Hymenoptera: Chrysididae), Trichrysis lacerta (Semenov, 1954) from the subfamily Chrysidinae, and Cleptes striatipleuris Rosa, Forshage, Paukkunen & Soon, 2015 from the subfamily Cleptinae, are newly documented for the Iranian fauna. The specimens were collected using Malaise traps in the Fars Province, south of Iran during 2015-2016. Notes about taxonomy, relevant references as well as geographical distribution of both species are given. The total number of Iranian Trichrysis and Cleptes currently increased to four and three species, respectively.