Milichiella parva
Differs from congeners in the combination of a reclinate and slightly lateroclinate posterior orbital seta, brown microtomentose ocellar triangle, dark calypter, and silvery microtomentose male T2-5.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plate brown microtomentose, frontal plate greyish, lunule black, basoflagellomere black, face brown microtomentose, palpus black; thorax with mesonotum 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 absent, calypter brown with dark margin, halter black, legs black except for yellow tip of fore and mid tibia, and all basitarsi; abdomen with T2-5 silvery microtomentose.
Morphology. Head: frons with 2+1 orbital and 2 frontal setae, anterior frontal seta medioclinate. In males frons 2.4-2.6x as wide at posterior margin than at base of antenna, arista about 3.6-4.2x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (4-5oc) and narrow emargination (1oc).
Thorax: 2 dc, 1 prsc, 1+0.7 pprn, 1+0.8 prs, 2+0.5 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 (2.0), and ultimate section of vein M1 2.6-2.7x as long as penultimate section. Fore femur slightly stronger 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 posterior margin with 1 row of setulae. S5 about 1.3x as long and 3x as wide as S4, 1.2x as long as wide, slightly setulose. Male genitalia with apical seta on cercus longer than epandrial setae, 1 seta on subepandrial plate, surstylus yellow, about 0.7x as long as epandrium, dilated posteroapically (1.5x) so that bent posteriorly, 4.1x as long as wide, structure of lateral surface smooth, medial surface without setulae.
Special characters: posterior orbital seta reclinate or lateroreclinate.
Body length: 2.5-3.2 mm; wing length: 2.0-2.9 mm.