Milichiella bakeri
Content
Description
Body length: 2.2-2.8 mm; wing length: 1.9-2.9 mm.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule black, basoflagellomere black, face slightly greyish microtomentose, palpus black; thorax with mesonotum slightly to normally brown microtomentose (golden brown from anterior view), scutellum and pleura same, wing hyaline, anterior margin slightly brownish, brown spot at tip of vein R1 absent, calypter brown with dark margin, halter black, legs black except for yellowish basitarsi; abdomen with T2-5 silvery microtomentose, except for anterolateral margins of T2.
Morphology. Head: frons with 2 orbital and 2+0.5 frontal setae, middle frontal seta slightly medioreclinate. In males frons 2.2x as wide at posterior margin than at base of antenna, arista about 5.2x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with wide notch (6-7oc) and emargination (3oc).
Thorax: 2 dc, 2 prsc, 2 pprn, 1+0.5 prs, 2 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 (2.4), and ultimate section of vein M1 2.0x 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 with more than 3 lines of setae, T2 posterolateral margin with 2-3 rows of setulae, T3 posterior margin with 1 row of setulae, T4 posterior margin with 2 rows of setulae, T5 posteromedial margin of silvery part with 1 row of setulae. S5 same as sp. 45; 2x as wide and longer than S4, slightly setulose, posterior margin indented. Male genitalia with similar to M. unicolor, 1 seta on subepandrial plate, surstylus 0.6x as long as epandrium high, bent posteriorly, dilated apically (1.5x), 2.4x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Special characters: palpus wide.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule black, basoflagellomere black, face slightly greyish microtomentose, palpus black; thorax with mesonotum slightly to normally brown microtomentose (golden brown from anterior view), scutellum and pleura same, wing hyaline, anterior margin slightly brownish, brown spot at tip of vein R1 absent, calypter brown with dark margin, halter black, legs black except for yellowish basitarsi; abdomen with T2-5 silvery microtomentose, except for anterolateral margins of T2.
Morphology. Head: frons with 2 orbital and 2+0.5 frontal setae, middle frontal seta slightly medioreclinate. In males frons 2.2x as wide at posterior margin than at base of antenna, arista about 5.2x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with wide notch (6-7oc) and emargination (3oc).
Thorax: 2 dc, 2 prsc, 2 pprn, 1+0.5 prs, 2 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 (2.4), and ultimate section of vein M1 2.0x 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 with more than 3 lines of setae, T2 posterolateral margin with 2-3 rows of setulae, T3 posterior margin with 1 row of setulae, T4 posterior margin with 2 rows of setulae, T5 posteromedial margin of silvery part with 1 row of setulae. S5 same as sp. 45; 2x as wide and longer than S4, slightly setulose, posterior margin indented. Male genitalia with similar to M. unicolor, 1 seta on subepandrial plate, surstylus 0.6x as long as epandrium high, bent posteriorly, dilated apically (1.5x), 2.4x as long as wide, structure of lateral surface smooth, medial surface with 3-5 setulae along anterior margin moving medially basally.
Special characters: palpus wide.
Diagnosis
Differs from congeners in the combination of slightly brown microtomentose mesonotum, 2 dc, 2 prsc, brown calypter, male T2-5 silvery microtomentose.
Distribution
Asia-Temperate: Eastern Asia (Taiwan present); Asia-Tropical: Malesia (Philippines present)
Citation
Taiwan, description of female (Hennig 1939: Beiträge zur Kenntnis des Kopulationsapparates und der Systematik der Acalyptraten. II. Tethinidae, Milichiidae, Anthomyzidae und Opomyzidae. – Arb. morph. taxon. Ent. Berl. 6: 81-94: 85)
Oriental catalog (Sabrosky 1977: Family Milichiidae, pp. 275-276. – In: Delfinado & Hardy, A catalog of the Diptera of the Oriental Region 3, x+854pp: 273)