Milichiella lacteiventris
Differs from congeners in the combination of slightly brown microtomentose mesonotum and male abdomen with T2 brown microtomentose except for silvery posterolateral corner, T3-4 silvery microtomentose except for brown microtomentose posteromedial spot which shimmers silvery depending on the direction of light, T5 silvery microtomentose.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule brown, basoflagellomere black, face greyish microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, scutellum and pleura same, except for shiny spots on an- and katepisternum, wing hyaline, veins brown, brown spot at tip of vein R1 very weak, calypter hyaline to yellowish, halter black, legs black except for yellow tarsi; abdomen with T2 brown microtomentose except for silvery posterolateral corner, T3-4 silvery microtomentose except for brown microtomentose posteromedial spot which shimmers silvery depending on the direction of light, T5 silvery microtomentose.
Morphology. Head: frons with 2 orbital and 2 frontal setae, anterior frontal seta medioclinate. In males frons 1.9x as wide at posterior margin than at base of antenna, arista about 3.0x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (5oc) and emargination (2oc).
Thorax: 2+1 dc, 2 prsc, 1+0.8 pprn, 1+0.8 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 (2.7), and ultimate section of vein M1 1.9x 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 2-3 lines of setae, T2-5 setulose. S5 1.1x as long as wide, 1.8x as long and 1.9x as wide as S4, setulose with longer setae posterolateral. Male genitalia with apical seta on cercus about as long as longest epandrial seta, 1 seta on subepandrial plate, surstylus 0.8x as long as epandrium high, bent posteriorly, dilated apically (1.7x), 1.8x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Body length: 2 mm; wing length: 2.6 mm.