Sphegina albolobata

The name comes from Latin ‘albolobata’, meaning ‘white-lobed’, referring to the white subtriangular lobe posteriorly on the male sternum IV.^[1]

In male specimens, the body length is 6.0 millimetres and the wing length is 4.9 millimetres. The face is concave with a strongly developed frontal prominence. The face is black, ventral half yellow; occiput black; basal flagellomere dark yellow; scape and pedicel yellow with black setae dorsally; thorax dark brown to black; scutellum black and semi-lunular, sub-shiny and weakly pollinose; pro- and mesoleg yellow, tarsomeres 2–5 black; metaleg with black coxa and yellow trochanter; metafemur black and yellow biannulate, slightly incrassate; metatibia black and yellow biannulate, with short rounded apicoventral dens; metatarsus entirely black, basal tarsomere thick. A large round area posterior of the lunula is non-pollinose and shiny. The basal flagellomere is oval, the arista short and pilose, nearly three 3 times as long as the basal flagellomere. No female specimens have been found.^[1]