Subfamily: fly in photo 12-13 mm
The Nearctic is home to only two species of Merosargus. From the Neotropics, 143 species have been described, with many others awaiting description. Mesosargus species are not found outside the Americas.
Woodley, writing in Brown et al. (2009), comments that "adults can be observed forming small territories around larval food sources, such as fallen fruit."