This species is distinguished from its congeners by the following combination of characters: Male with head longer than high, distinctly produced vibrissal angle, and strongly warped upward facial margin. Both sexes with anterior frontal seta 0.66-1.00x as long as posterior seta. Palpus black and enlarged. Forefemur almost entirely yellow with anterodorsal brown stripe distally; mid- and hindfemora yellow; posteroventral brush on hindtarsus dark.
Male. Predominantly black; coxae and femora, mid- and hindtibiae and mid- and hindtarsi except distal tarsomeres yellow.
Head: Anterior frontal seta 0.66-1.00x as long as posterior frontal seta. Postorbital region 1/5-1/4x as long as eye. Vibrissal angle distinctly produced anteriorly, as broad as first flagellomere, the angle emphasised by shiny black lateroventral corner of facial plate immediately mesad of vibrissal angle and usually warped forward and upward beyond it. Ventral margin of head comparatively long and face deeply concave as seen in profile, antenna in deep fovea. Palpus enlarged.
Wing: Length: 1.9-2.8 mm.
Abdomen: Tergites 1-4 microtrichose and subshiny medially, lateral and posterior margins polished, microtrichose spots progressively decreasing posteriorly, so that tergite 4 is microtrichose only anteromedially. Tergite 5 and all sternites polished. Abdominal reservoirs present.
Female. Differs from male in head not elongated and vibrissal angle less than half as long as first flagellomere. (Brake & Freidberg 2003)