Milichiella longiseta
Content
Description
Body length: 3.1-3.7 mm; wing length: 2.6 mm.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule black, basoflagellomere brown, face greyish microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, scutellum and pleura brown microtomentose except for shiny spots on an- and katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 very weak, calypter hyaline with yellow or light brown margin and yellow hairs, halter black, legs black except for yellowish tarsi; abdomen with T2-5 silvery microtomentose.
Morphology. Head: frons with 2 orbital and 2 frontal setae, anterior frontal seta medioclinate. In males frons 2.4x as wide at posterior margin than at base of antenna, arista about 3.7x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with wide notch (6-7oc) and narrow emargination (1-2oc).
Thorax: 2 dc, 2 prsc, 2 pprn, 1+0.8 prs and row of shorter setae, 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 (2.6), and ultimate section of vein M1 1.7x 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 mostly with 2 lines of setae but triangular extension with more setae, T2-5 posterior margin with 1 row of setulae, more on posterolateral margins of T2, tip of T5 with long setae. S5 more than 2x as wide and 2x as long as S4, roundish, posterior margin more angular, indented, slightly setulose. Male genitalia with apical seta on cercus longer than epandrial setae, 1-2 seta on subepandrial plate, surstylus 0.6x as long as epandrium high, bent posteriorly, dilated apically (1.7x), 2.2x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule black, basoflagellomere brown, face greyish microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, scutellum and pleura brown microtomentose except for shiny spots on an- and katepisternum, wing hyaline, veins light brown, brown spot at tip of vein R1 very weak, calypter hyaline with yellow or light brown margin and yellow hairs, halter black, legs black except for yellowish tarsi; abdomen with T2-5 silvery microtomentose.
Morphology. Head: frons with 2 orbital and 2 frontal setae, anterior frontal seta medioclinate. In males frons 2.4x as wide at posterior margin than at base of antenna, arista about 3.7x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with wide notch (6-7oc) and narrow emargination (1-2oc).
Thorax: 2 dc, 2 prsc, 2 pprn, 1+0.8 prs and row of shorter setae, 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 (2.6), and ultimate section of vein M1 1.7x 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 mostly with 2 lines of setae but triangular extension with more setae, T2-5 posterior margin with 1 row of setulae, more on posterolateral margins of T2, tip of T5 with long setae. S5 more than 2x as wide and 2x as long as S4, roundish, posterior margin more angular, indented, slightly setulose. Male genitalia with apical seta on cercus longer than epandrial setae, 1-2 seta on subepandrial plate, surstylus 0.6x as long as epandrium high, bent posteriorly, dilated apically (1.7x), 2.2x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Diagnosis
Differs from congeners in the combination of slightly brown microtomentose mesonotum, 2 dc, calypter hyaline with yellow or light brown margin and yellow hairs.
Citation
Hawaii
figs of head, male abdomen, terminalia, swarming (Hardy & Delfinado 1980: Family Milichiidae, pp. 351-367. – In: Hardy & Delfinado, Diptera:Cyclorrhapha III, Series Schizophora, Section Acalypterae, Exclusive of Family Drosophilidae. Insects of Hawaii 13, pp. 1-451: 365)
Australasian/Oceanian catalog (Sabrosky 1989: 78. Family: Milichiidae, pp. 555-557. – In: Evenhuis, Catalog Diptera, Australian and Oceanian Regions 86: 557)