Differs from congeners in the combination of slightly brown microtomentose mesonotum, and shiny ocellar triangle and orbital plates, and male T2-5 brown microtomentose except for posterolateral silvery spots on T5.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule brown, basoflagellomere black, face grey microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, pleura same, scutellum more strongly microtomentose, wing hyaline, veins brown, brown spot at tip of vein R1 weak, calypter hyaline with brown margin, halter black, legs black except for lighter tarsal joints, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose except for posterolateral silvery spots on T5. Female coloration and vestiture: thorax with mesonotum slightly brown microtomentose, scutellum and pleura same, halter yellow, calypter white, abdomen with T2-4 brown microtomentose, T5 shiny.
Morphology. Head: frons with 3 orbital and 2+0.5 frontal setae, middle frontal seta medioclinate. In males frons 1.8x as wide at posterior margin than at base of antenna, arista about 3.6x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (3-4oc) and emargination (2oc). Female posterior eye margin with small notch (2oc) and emargination
Thorax: 2+1 dc, 2+1 prsc, 1+0.6 pprn, row of prs across mesonotum, including presutural dc and prsc, 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 (2.4), and ultimate section of vein M1 1.7-2.1x as long as penultimate section. Fore femur strongly setulose, tibial organ absent.
Male abdomen: posteromedial triangular projection of T1 into T2 present. Tergal chaetotaxy: T2 anterolateral corner with more than 3 lines of setae, T2-5 posterior half setulose except for silvery parts. S5 similar to M. unicolor. Male genitalia with 1 seta on subepandrial plate, surstylus 0.9x as long as epandrium high, dilated posteroapically (1.7x), 3.6x as long as wide, structure of lateral surface smooth, medial surface with 3 setae along anterior margin.
Special characters: posteroventral side of head strongly setulose; middle prsc in middle of mesonotum.
Body length: 2.5 mm; wing length: 2.5 mm.