Milichiella bimaculata
Description
Body length: 2.5 mm; wing length: 2.5 mm.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule brown, basoflagellomere black, face grey microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, pleura same, scutellum more strongly microtomentose, wing hyaline, veins brown, brown spot at tip of vein R1 weak, calypter hyaline with brown margin, F: white, halter black, legs black except for lighter tarsal joints, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose except for posterolateral silvery spots on T5. Female coloration and vestiture: thorax with mesonotum slightly brown microtomentose, scutellum and pleura same, halter yellow, calypter white, abdomen with T2-4 brown microtomentose, T5 shiny.
Morphology. Head: frons with 3 orbital and 2+0.5 frontal setae, middle frontal seta medioclinate. In males frons 1.8x as wide at posterior margin than at base of antenna, arista about 3.6x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (3-4oc) and emargination (2oc). Female posterior eye margin with small notch (2oc) and emargination
Thorax: 2+1 dc, 2+1 prsc, 1+0.6 pprn, row of prs across mesonotum, including presutural dc and prsc, 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 (2.4), and ultimate section of vein M1 1.7-2.1x 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, T2-5 posterior half setulose except for silvery parts. S5 similar to nigeriae and M. unicolor. Male genitalia with 1 seta on subepandrial plate, surstylus 0.9x as long as epandrium high, dilated posteroapically (1.7x), 3.6x as long as wide, structure of lateral surface smooth, medial surface with 3 setae along anterior margin.
Special characters: posteroventral side of head strongly setulose; middle prsc in middle of mesonotum.
Male coloration and vestiture: frons subshiny black, ocellar triangle and orbital plates shiny black, lunule brown, basoflagellomere black, face grey microtomentose, palpus black; thorax with mesonotum slightly brown microtomentose, pleura same, scutellum more strongly microtomentose, wing hyaline, veins brown, brown spot at tip of vein R1 weak, calypter hyaline with brown margin, F: white, halter black, legs black except for lighter tarsal joints, fore and hind tarsus with yellow brush; abdomen with T2-5 brown microtomentose except for posterolateral silvery spots on T5. Female coloration and vestiture: thorax with mesonotum slightly brown microtomentose, scutellum and pleura same, halter yellow, calypter white, abdomen with T2-4 brown microtomentose, T5 shiny.
Morphology. Head: frons with 3 orbital and 2+0.5 frontal setae, middle frontal seta medioclinate. In males frons 1.8x as wide at posterior margin than at base of antenna, arista about 3.6x as long as basoflagellomere wide, pubescence on arista very short, posterior eye margin with notch (3-4oc) and emargination (2oc). Female posterior eye margin with small notch (2oc) and emargination
Thorax: 2+1 dc, 2+1 prsc, 1+0.6 pprn, row of prs across mesonotum, including presutural dc and prsc, 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 (2.4), and ultimate section of vein M1 1.7-2.1x 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, T2-5 posterior half setulose except for silvery parts. S5 similar to nigeriae and M. unicolor. Male genitalia with 1 seta on subepandrial plate, surstylus 0.9x as long as epandrium high, dilated posteroapically (1.7x), 3.6x as long as wide, structure of lateral surface smooth, medial surface with 3 setae along anterior margin.
Special characters: posteroventral side of head strongly setulose; middle prsc in middle of mesonotum.
Diagnosis
Differs from congeners in the combination of slightly brown microtomentose mesonotum, and shiny ocellar triangle and orbital plates, and male T2-5 brown microtomentose except for posterolateral silvery spots on T5.
Discussion
The type series of M. bimaculata consists of an unspecified number of males collected by Becker on Gran-Canaria. The types are probably lost. There are 2 specimens from Tenerife in ZMHU, which were later labeled as types, but which don't belong to the type series if Becker’s type locality is to be believed. Since the species is easily recognised, there is no need to designate a neotype. For M. freyi there are 3 female syntypes.
M. freyi has been synonymized with M. bimaculata by Deeming & Baez 1985.
M. freyi has been synonymized with M. bimaculata by Deeming & Baez 1985.
Citation
on Euphorbia regis jubae, Canary Islands (Frey 1936: Die Dipterenfauna der Kanarischen Inseln und ihre Probleme. – Commentat. biol. 6(1): 1-237: 124)
fig. of head, Canary Islands (Deeming & Báez 1985: Some Milichiidae (Diptera, Cyclorrhapha) from the Canary Islands. – Entomologist's mon. Mag. 121: 63-69: 66)
citation, type information (Hennig 1937: Milichiidae et Carnidae, pp. 1-91. – In: Lindner, Die Fliegen der palaearktischen Region 61a: 27)
Palaearctic catalog (Papp 1984: Family Milichiidae + Carnidae, pp. 110-123. – In: Soos, A. & Papp, L., Catalogue of Palaearctic Diptera 10, pp. 110-1: 113)
catalog, Canary Is. (Carles-Tolrá & Báez 2002: Milichiidae, p. 174. – In: Carles-Tolrá, Catálogo de los Diptera de España, Portugal y Andorra (Insecta) 8: 174)
fig. of male abdomen (Becker 1907: Die Dipteren-Gruppe Milichiinae. – Annls hist.-nat. Mus. natn. hung. 5: 507-550: 34)
on flowers of Schinus mollis (Becker 1908: Dipteren der Kanarischen Inseln. – Mitt. zool. Mus. Berl. 4: 1-180: 163)
Canary Islands (Frey 1958: Kanarische Diptera brachycera p.p., von Håkan Lindberg gesammelt. – Commentat. biol. 17(4): 1-63: 62)