Milichiella aeroplana
Differs from congeners in the combination of yellow halter, male T2-5 brown microtomentose and shape of surstylus.
Male coloration and vestiture: frons subshiny black, ocellar triangle brown microtomentose and orbital plates subshiny, lunule brown, basoflagellomere brown, face grey microtomentose, palpus black; thorax with mesonotum brown microtomentose, scutellum same, pleura grey microtomentose except for shiny spots on anepisternum and most of katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 very weak, calypter hyaline with yellow margin, halter yellow, legs black except for base of fore tibia and mid and hind basitarsus, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose, tip of T5 subshiny.
Morphology. Head: frons with ? orbital and 2 frontal setae, anterior frontal seta ?. In males frons 1.9x as wide at posterior margin than at base of antenna, arista about ?x as long as basoflagellomere wide, pubescence on arista ?, posterior eye margin with notch (6oc) and emargination (3oc).
Thorax: 2? dc, ? prsc, 1 pprn, 1 prs, 2 keps setae, posterior prsc ?x as long as posterior dc, seta between posterior prsc and posterior dc ?. Wing with vein R4+5 and M1 converging (2.0), and ultimate section of vein M1 2.3x as long as penultimate section. Fore femur normal setulose, tibial organ absent.
Male abdomen: posteromedial triangular projection of T1 into T2 weak. Tergal chaetotaxy: T2 anterolateral corner with 2-3 lines of setae, T2-5 posterior third to half setulose. S5 1.1x as long as wide, <1.4x as long and <1.2x as wide as S4, setulose on posterior 3/4. Male genitalia with apical seta on cercus longer than epandrial setae, 1 seta on subepandrial plate, surstylus 0.9x as long as epandrium high, slightly bent posteriorly, dilated posteroapically (1.7x), 5.3x as long as wide, structure of lateral surface smooth, medial surface with two long setae on basal half at anterior margin.
Body length: ? mm; wing length: 2.4 mm.