[1][2] All are characterized by their metatibiae, which are usually enlarged, but always with a brush of long pile along the dorsal edges.
These flies are probably mimics of the stingless bees in the tribe Meliponini.
[3] The presence or absence of the appendix on vein R4+5 is variable within this group.
[3] The type species of Carreramyia, Hypselosyrphus and Stipomorpha were formerly included in Ubristes; the latter two genera were also considered subgroups of Ubristes.
All three are now considered separate genera by Reemer & Ståhls (2013).