A Review of the Genus Cheilosia (Diptera, Syrphidae) from Iran. Khaganinia, S., Kazerani, F. - Based on study of references and specimens collected by the authors in the East Azarbaijan Province during 2010-2012, 14 species of Cheilosia Meigen, 1822 known from Iran are listed. Four of them, Cheilosia mutabilis (Fallién, 1817), C. nigripes (Meigen, 1822), C. variabilis (Panzer, 1798), and C. vulpina (Meigen, 1822) are recorded from Iran for the first time. Diagnostic characters and geographical distribution of the species are provided. An illustrated key to Iranian Cheilosia is given.