The focus of this study is to make important contributions to Meloidae taxonomy. Specimens belonging to thirty-two species of the family Meloidae (Coleoptera) were collected from Ankara province in 2018-2019. Male genital structures of these species were examined. Photographs and drawings of the male genital organ structures of all these species (32 species), and descriptions of some of them, which were found to be missing in the current literature, were given. The taxonomic key has been constructed for these species from the present literature and examined materials. Also, male genital organs of all species were compared to the literature. Photographs and drawings of the male genital organs of Alosimus luteus (Waltl, 1838), A. marginicollis (Haag-Rutenberg, 1880) and Euzonitis rubida (Ménétriés, 1832) were given for the first time with this study.