Abstract Eumerus Meigen, 1823 is a very speciose genus of flower flies from the Eastern Hemisphere.Several reports of introduced species of this genus in the Americas have been recorded since early in the twentieth century, with a present list of six species recorded to date from the Americas and the US territory of Hawaii.In this paper we give new geographical records for Other Card Games the African-native species Eumerus obliquus (Fabricius, 1805), which reflect the expansion of this fly through Brazil and Paraguay along the last twenty years.At the same time, we report a second species from Paraguay, Eumerus aurifrons (Wiedemann, 1824), being this the first Western Hemisphere record for this Asian-native species.We finally provide an identification key Display Console Assembly to all of the species of Eumerus presently known from the Americas and Hawaii.