Differs from congeners in the combination of brown microtomentose ocellar triangle and mesonotum, calypter hyaline with brown margin, and silvery microtomentose T2-5.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates brown microtomentose, lunule brown, basoflagellomere black, face greyish microtomentose, palpus black; thorax with mesonotum brown microtomentose, scutellum and pleura same except for small shiny spots on an- and katepisternum, wing hyaline, veins brown, brown spot at tip of vein R1 weak, calypter hyaline with brown margin and brown hairs, halter black, legs black except for yellow tip of fore tibia and all basitarsi; abdomen with T2-5 silvery microtomentose. Female coloration and vestiture: halter yellow, abdomen with T2-5 brown microtomentose.
Morphology. Head: frons with 2 orbital and 2+0.5 frontal setae, middle frontal seta medioclinate. In males frons 2.4x as wide at posterior margin than at base of antenna, arista about 5.1x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with wide notch (5-6oc) and narrow emargination (1-2oc).
Thorax: 2, 2+1 or 3+1 dc, 1 prsc, 1 pprn, 1+0.7+0.5 prs, 2+0.8 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 (2.0-2.2), and ultimate section of vein M1 2.2-2.3x 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 mostly 2 lines of setae but triangular extension with more setae, T2-5 posterior margins with 1 row of setulae, posterolateral corner of T2 with 2 rows. S5 1.2-1.3x as long as wide, 1.5x as long and 2.1-2.2x as wide as S4, extremely setulose posterolaterally. Male genitalia with apical seta on cercus about as long as longest epandrial seta, 1 seta on subepandrial plate, surstylus 1.2-1.3x as long as epandrium high, bent posteriorly, dilated apically (2.1x), 8.0-8.9x as long as wide, structure of lateral surface smooth, medial surface with line of long setae along anterior margin.
Body length: 4.1 mm; wing length: 3.3-3.5 mm.