Ubristes (Ubristes) flavitibia Walker  

Ubristes is characterized by the metatibia usually enlarged but always with a brush of long pile on the dorsal edge. The presence or absence of the appendix on vein R4+5 is variable in this group. The group is divided into an number of subgroups (Hypselosyrphus, Stipomorpha, Ubristes) on the basis of the shape of the abdomen (Cheng and Thompson 2008).

Ubristes (Ubristes) species have postmetacoxal bridge complete; abdomen oval or rectangular; metatibia with long pile along dorsal edge, forming a distinct brush of pile; and vein R4+5 with an appendix extending posteriorly into cell R4+5.