Male. Frons 0.13?0.17 times as wide as head width; gena 0.38?0.39 times as wide as eye height. Innervertical seta 0.29?0.33 times as long as eye height, shorter than ocellar seta, 1.5?2 times as long as outervertical seta. 1st flagellomere 3?4 times as long as pedicel; total width of arista including plumosity 3?4 timesas wide as 1st flagellomere. Prementum 3?4 times as long as wide; palpus 3/8 eye height. Thorax with densegrayish yellow pruinosity and 2 pairs of longitudinal black vittae, an inner vitta 1/2?1/4 as wide as pruinoseportion between inner and outer vittae. Scutellum with yellowish pruinosity except black base. 2 presuturaland 3 postsutural dorsocentral setae; 2 katepisternal setae; proepisternum bare. Wing hyaline, strongly tingedwith yellow on base, brown on anterior and median portion; tegula and basicosta brownish black; calypteryellow. Costal spine subequal in length to crossvein r-m or slightly longer; relative lengths of 2nd, 3rd and 4thcostal sectors approximately 1:2:1; vein M from dm-cu crossvein to its bend 2.2?4.0 times distance betweenthe bend and wing margin. Lower calypter with short fringe. Legs brownish black, tibiae yellow, apex offemora brownish yellow ventrally. Mid tibia with 2 posterodorsal setae. Abdomen reddish yellow in groundcolor, black on mid-dorsal longitudinal portion and posterior margin of tergites; tergites 3 and 4 with paleyellowish pruinosity on anterior 1/2?1/5; tergite 5 mostly with gray pruinosity. Syntergite 1+2 with 1 pair of median marginal and 1 lateral marginal setae; tergite 3 with 2 pairs of median discal, 1 pair of median marginal and 1 lateral marginal seta; tergite 4 with 2 pairs of median discal and a row of marginal setae; tergite 5 with irregularly set discal and a row of median marginal setae. Male terminalia. Cerci slender on apical 1/2; surstylus black, slender, apex pointed and bent outward and backward; postgonite about as long as flattened basiphallus.Female. Smaller than male. Frons 0.31?0.34 times as wide as head width; gena 0.5?0.54 times as wide as eye height; inner vertical seta about 0.6 times as long as eye height, twice as long as outer vertical seta; 6?8inclinate frontal setae; 2 proclinate orbital setae stronger than frontal seta; 1 outwardly directed preverticalseta about as long as ocellar seta; palpus subequal in length to 1st flagellomere. Dark outer thoracic vitta 4?5times as wide as inner vitta; anterior and median portion of wing dark brown; claw of fore leg about 1/2 lengthof tarsomere 5. Abdomen ovate, orange brown, broadly blackish on mid longitudinal portion of tergites 3 and4, and posterior 1/3?2/5 of tergite 3 and 1/2 of tergites 4 and 5, with rather dense yellowish white pruinosityon anterior 1/5?1/4 of tergite 3, 1/3?3/5 of tergites 4 and 5; syntergite 1+2 without median marginal setae,tergites 3 to 5 without discal seta. Other characters as in male.