Sphegina apicalis

In male specimens, body length is 5.2 to 5.5 millimeters and wing length is 4.4 to 4.7 millimeters. The face is black and concave with a weakly developed frontal prominence. The gena is black, mouth edge brown to dark yellow, with large triangular non-pollinose shiny area; occiput black; antenna black with black setae dorsally on scape and pedicel; thorax dark brown to black; scutellum black, shiny, and subtriangular; pro- and mesoleg yellow, tarsomeres 4 and 5 black; metaleg with coxa black, trochanter yellow; femur black and yellow biannulate, incrassate; tibia black and yellow biannulate, without apicoventral dens; tarsus entirely black, basal tarsomere very thick. A very narrow semi-circular area posterior of the lunula is non-pollinose and shiny. The basal flagellomere is squarish, the basal ¼ of the arista short and pilose, about three times as long as the basal flagellomere. The cerci are unmodified and subtriangular; surstyli asymmetrical, the ventral lobe on the right side with subtriangular lobe on posterior margin, on the left side with a long vertical lobe laterally; superior lobe with several sublobes. Female specimens are much the same except for normal sexual dimorphism; body length is 5.0 millimeters and wing length is 3.9 millimeters.^[1]