Milichiella tristis
Description
Body length: 2.3 mm; wing length: 2.0 mm.
Male coloration (from original description): frons dull black, ocellar triangle and orbital plates rather shiny, basoflagellomere black, palpus black, mesonotum slightly brown microtomentose, halter orange, legs black except for orange tarsi, abdomen with T2-5 slightly brown microtomentose. Female coloration and vestiture (from syntype): frons slightly greyish on anterior half and slighly brown on posterior half, frontal plates grey microtomentose, ocellar triangle and orbital plates brown microtomentose, lunule brown, basoflagellomere black, face greyish microtomentose, palpus black; thorax with mesonotum brown microtomentose, scutellum same, pleura greyish microtomentose with shiny m-nigrum spot and shiny spot on katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 very weak, calypter hyaline with brown margin, halter yellow, legs black except for tip of fore tibia and all basitarsi, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose.
Morphology. Head: frons with 2+0.5 orbital and 2 frontal setae, anterior frontal seta. In males frons ?x as wide at posterior margin than at base of antenna, arista about ?x as long as basoflagellomere wide, pubescence on arista ?. Female posterior eye margin with notch (4oc) and emargination (2oc).
Thorax: 1 dc, 1 prsc, 1 pprn, 1 prs, 2+1 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 weakly converging (1.4), and ultimate section of vein M1 2.9x as long as penultimate section. Tibial organ ?.
Male coloration (from original description): frons dull black, ocellar triangle and orbital plates rather shiny, basoflagellomere black, palpus black, mesonotum slightly brown microtomentose, halter orange, legs black except for orange tarsi, abdomen with T2-5 slightly brown microtomentose. Female coloration and vestiture (from syntype): frons slightly greyish on anterior half and slighly brown on posterior half, frontal plates grey microtomentose, ocellar triangle and orbital plates brown microtomentose, lunule brown, basoflagellomere black, face greyish microtomentose, palpus black; thorax with mesonotum brown microtomentose, scutellum same, pleura greyish microtomentose with shiny m-nigrum spot and shiny spot on katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 very weak, calypter hyaline with brown margin, halter yellow, legs black except for tip of fore tibia and all basitarsi, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose.
Morphology. Head: frons with 2+0.5 orbital and 2 frontal setae, anterior frontal seta. In males frons ?x as wide at posterior margin than at base of antenna, arista about ?x as long as basoflagellomere wide, pubescence on arista ?. Female posterior eye margin with notch (4oc) and emargination (2oc).
Thorax: 1 dc, 1 prsc, 1 pprn, 1 prs, 2+1 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 weakly converging (1.4), and ultimate section of vein M1 2.9x as long as penultimate section. Tibial organ ?.
Diagnosis
Differs from congeners in the combination of posterior eye margin with notch and emargination, slightly brown microtomentose mesonotum, yellow halter and slightly brown microtomentose male abdomen
Discussion
The original type series consisted of an unknown number of males and 2 females. The male(s) are lost, but the females are in BMNH. They are mounted on minutens which are placed together in one cork plate. Since there are no male types left the species identity is uncertain.