Broadly sympatric occurrence of two thief ant species (Latreille, 1798) and (Arakelian, 1991) in the East European Pontic-Caspian region (Hymenoptera, Formicidae) is disclosed.

This paper presents numeric morphology-based evidence on the broadly overlapping distribution of two thief ant species (Latreille, 1798) and (Arakelian, 1991) in the East European Pontic-Caspian region. The paper integrates two autonomous data collections and independent analyses performed by different researchers, using different equipment, considering different character combinations, and evaluating partially different samples. Five type series, the neotype series of (Latreille 1798) and the type series of (Nylander, 1849), S.