New geographical records and key to the species of Eumerus Meigen, 1823 (Diptera, Syrphidae) introduced into the Americas and Hawaii
Abstract Eumerus Meigen, 1823 is a very speciose genus of flower flies from the Eastern Hemisphere.Several reports of simply delightful fat quarter bundle 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 territor