Milichiella boliviana
Differs from congeners in the male abdomen with T1-5 shiny black except for silvery microtomentose paired small spots close to abdominal triangle on T2, and narrow anterior margins of T3-5.
Male coloration and vestiture: frons shiny black, sculptured on anterior 3/5, lunule black, basoflagellomere black, face black microtomentose, palpus black, basomedially yellow; thorax with mesonotum subshiny black, scutellum and pleura same, wing hyaline, veins yellow, brown spot at tip of vein R1 present, calypter brown or hyaline with brown margin and brown hairs, halter black, legs black except for yellow basitarsi, fore tibia appears yellow ventroapically due to brush of yellowish setae; abdomen with T1-5 shiny black except for silvery microtomentose paired small spots close to abdominal triangle on T2, and narrow anterior margins of T3-5. Female coloration and vestiture: halter black, abdomen with T2-5 shiny black except for brown microtomentose narrow anterior margins.
Morphology. Head: frons with 1 (middle) orbital and 2 frontal setae, anterior frontal seta medioclinate. In males frons 3.0x as wide at posterior margin than at base of antenna, arista about 7.0x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (4oc) and emargination (2oc).
Thorax: 1 dc, 0 prsc, 1 pprn, 1 prs, 2 keps setae, posterior prsc less than 0.8x as long as posterior dc, seta between posterior prsc and posterior dc absent. Wing with vein R4+5 and M1 converging (~2.4), and ultimate section of vein M1 2.0x as long as penultimate section. Fore femur normal setulose, tibial organ present.
Male abdomen: posteromedial triangular projection of T1 into T2 present. Tergal chaetotaxy: T2 anterolateral corner with single line of setae, T2-5 black parts with some fine setulae. S5 same as M. poecilogastra. Male genitalia with apical seta on cercus slightly longer than epandrial setae, 1 seta on subepandrial plate, surstylus 0.5x as long as epandrium high, dilated posteroapically (1.3x), with apical edentation, 0.9x as long as wide, structure of lateral surface smooth, medial surface without setulae.
Special characters: proboscis elongated with labella 2.2x as long as palpus and about as long as vertical eye diameter, female with long lunule, ventral tip of lunule reaching distal half of basoflagellomere (male: tip of lunule reaches middle of pedicel), head and thorax finely sculptured.
Body length: 2.5 mm; wing length: 2.7 mm.