Differs from congeners in the combination of mesonotum brown microtomentose, calypter margin light brown, legs black except for yellow basotarsomeres, male T2-5 silvery microtomentose except for tip of T5, posteromedial triangular projection of T1 into T2 very weak, male S5 sculptured.
Male coloration and vestiture: frons brown, ocellar triangle and orbital plates brown microtomentose, lunule ?, basoflagellomere black, face ?, palpus black; thorax with mesonotum brown microtomentose, scutellum and pleura same, wing hyaline, veins light brown, brown spot at tip of vein R1 absent, calypter hyaline with light brown margin, halter black, legs black except for yellow basotarsomeres; abdomen with T2-5 silvery microtomentose except for tip of T5.
Morphology. Head: frons with 2+0.4 orbital and 2 frontal setae, anterior frontal seta ?. In males frons ?x 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.
Thorax: 2 dc, 1 prsc, 1 pprn, 1 prs, 2 keps setae, posterior prsc less than 0.8x as long as posterior dc, seta between posterior prsc and posterior dc absent. Wing with vein R4+5 and M1 weakly converging (1.6), and ultimate section of vein M1 3.2x as long as penultimate section. Fore femur normal setulose, tibial organ absent.
Male abdomen: posteromedial triangular projection of T1 into T2 very weak. Tergal chaetotaxy: T2 posterior margin with 1-2, T3-4 with one row of setulae, T5 tip setulose. S5 1.2x as long as wide, 1.7x as long and 5.3x as wide as S4, nearly heart shaped with posterior two tips raised into small bulges, setulose. Male genitalia with apical seta on cercus as long as epandrial setae, 1 seta on subepandrial plate, surstylus 0.6x as long as epandrium high, bent posteriorly, dilated apically (1.5x), 3.2x as long as wide, structure of lateral surface smooth, medial surface without setulae.
Special characters: S5 sculptured and not flat.
Body length: ? mm; wing length: 2.7 mm.