Fannia postica (Stein, 1895)

Wang, Ming-fu, Li, Kai & Zhang, Dong, 2011, Taxonomic review of the postica-group of Fannia Robineau-Desvoidy (Diptera, Fanniidae) from China, with the description of one new species, ZooKeys 112, pp. 1-19 : 3-5

Fannia postica (Stein, 1895) Figs 4-6

Homalomyia postica Stein 1895: 89.

Fannia postica (Stein): Hennig 1955: 72; Chillcott 1961: 103; Pont 1986: 53; Xue and Wang 1998: 819; Wang and Xue 2002: 57; Su and Wang 2004: 111; Wang et al. 2006: 555.

Description.

MALE. Body length 4.0 mm. Eye bare, facets slightly enlarged on anterior margin in upper part; fronto-orbital plate, parafacial and gena with densely grey pruinosity; the median part of frons about 1.5 times as wide as anterior ocellus, as wide as 2/3 of postpedicel, frontal vitta black, linear at middle, frontal setae 6 or 7, situated in the lower 3/4 of frons, orbital setae absent; postocular setulae short, in one row, regularly placed; parafacial bare, about half as wide as postpedicel width at middle; antenna black, postpedicel 2.0 times as long as wide, arista black, distinctly swollen in basal part, ciliated, the longest hair about equal to aristal base; epistoma not projecting beyond vibrissal angle, vibrissal angle behind frontal angle in profile; gena and genal dilation with black hairs; genal height about 1/10 of eye height, upper margin of gena without upcurved se tae; proboscis short, prementum with thin greyish-yellow pruinosity, its length 1.8-2.0 times as long as its width, palpus black, claviform, about as long as prementum. Thorax ground-colour black, with dark brown pruinosity, scutum without stripes; presutural acr biserial, only prescutellar pairs slightly stout, the distance between two acr rows slightly narrower than the distance between acr row and dc row, dc 2+3, ia 0+2, pra 2, the anterior one about 1/2 length of posterior notopleural seta, notopleuron without setulae; basisternum, proepisternum, anepimeron, meron and katepimeron bare; katepisternal setae 1:1, katepisternum without ventral spines; anterior spiracles yellowish, the posterior ones brownish-yellow; calypters yellow, lower one slightly projecting beyond upper one. Wing brownish; veins brown, tegula dark brown, basicosta brownish-yellow, costal spine inconspicuous; vein Sc curved bow-like; node of Rs bare on ventral and dorsal surfaces; veins R4+5 and M parallel to each other distally; crossveins without obvious cloud; haltere brownish-yellow. Legs entirely black; fore tibia without median p, fore first tarsomere with 2 or 3 longish basal setae on ventral surface; mid coxa without any hooked spines or spine-like setae on lower and outer margins, mid femur with sparse and long av row in basal half, becoming gradually shorter towards apex, comb-like in basal 1/3, pv row complete, becoming gradually shorter towards apex, p row complete, mid tibia swollen in distal half, with 1 ad and 1 pd in distal half, with numerous hairs on ventral surface, the longest ones about 3/4 of mid tibia width, mid first tarsomere without basal tooth-like spines on ventral surface; hind coxa bare on posterior surface, hind femur with short av row in basal half, becoming gradually longer towards apex, 4-6 long and stout av in distal half, pv row inconspicuous in basal half, 4 or 5 stout pv in distal half, hind tibia with 1 median av, 1 ad and 1 d. Abdomen oval, depressed and flattened, ground-colour black, with greyish-brown pollinosity; syntergite 1+2 to tergite 4 each with dark triangular mark at middle, tergite 5 only with narrow stripe at middle; sternite 1 bare.

Material examined.

China: Heilongjiang: 2 ♂, Xilinji, 53°28'48"N, 122°22'12"E, 19.VI.1986, Coll. C.Y. Cui.

Distribution.

China (Heilongjiang), Europe, North America.