Differs from congeners in the combination brown microtomentose mesonotum, 2 dc, 2 pprn, calypter hyaline or yellowish, tibiae black, silvery microtomentose male T2-5, and triangular shape of male S5.
Male coloration and vestiture: frons subshiny black, ocellar triangle and upper orbital plates shiny black, lunule black, basoflagellomere black, face greyish microtomentose, palpus black; thorax with mesonotum brown microtomentose, scutellum and pleura same, except for shiny spots on an- and katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 absent, calypter hyaline or yellowish, halter black, legs black except for yellow basitarsi, hind basitarsus darker; abdomen with T2-5 silvery microtomentose.
Morphology. Head: frons with 2 orbital and 2+0.6 frontal setae, middle frontal seta medioclinate. In males frons 2.3x as wide at posterior margin than at base of antenna, arista about 4.2x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (5oc) and emargination (2oc).
Thorax: 2 dc, 2 prsc, 1+0.8 pprn, 1+0.8+0.5 prs, 2+0.6 keps setae, posterior prsc about as long as posterior dc, seta between posterior prsc and posterior dc present. Wing with vein R4+5 and M1 converging (3.2), and ultimate section of vein M1 1.6x as long as penultimate section. Fore femur slightly stronger setulose, tibial organ absent.
Male abdomen: posteromedial triangular projection of T1 into T2 present. Tergal chaetotaxy: T2 anterolateral corner with 2-3 lines of setae, T2-5 posterior margin with 1 row of scarce setulae. S5 1.2x as long as wide, 1.7-1.8x as long and 2.3-3.2x as wide as S4; shape triangular with posterior margin indented. Male genitalia with apical seta on cercus longer than epandrial setae, 1 seta on subepandrial plate, surstylus ~0.7x as long as epandrium high, dilated apically (1.4-1.7), 2.9-3.1x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Body length: 3.5 mm; wing length: 2.9 mm.