Fannia corvina (Verrall, 1892)

Description: Male: Body length 5.0– 5.5 mm. Eye with sparse and short hairs, facets slightly enlarged on anterior margin in upper part; postocular setae irregularly placed; occipital setae in one row; fronto-orbital plate and parafacial with greyish-white pruinosity; the median part of frons about as wide as 2/3 of antennal first flagellomere, frontal vitta black, linear in median part, frontal setae 8 or 9, the gaps filled with numerous fine setae, upper orbital setae absent; parafacial bare, about as wide as 3/4 of first flagellomere width in median part; antenna black, first flagellomere 2.0X longer than wide, arista ciliated, the longest hair slightly shorter than width of arista at base; epistoma not projecting beyond vibrissal angle, vibrissal angle behind frontal angle in profile; gena and genal dilation with black hairs, upper margin of gena without upcurved setae; proboscis stout, labella large, prementum with grayish-brown pruinosity, its length 2.0X longer than its width, palpus black, claviform, slightly longer than prementum. Thorax black in ground colour, notum with light brownish gray pruinosity, without distinct vitta; presutural acr triserial, hair-like, 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 1, about 4/5 of the length of posterior notopleural seta, notopleuron without seta; basisternum, proepisternum, anepimeron, meron and katepimeron bare; katepisternal setae 1:1, katepisternum without ventral spines; spiracles brown; calypters yellow, the lower one slightly projecting beyond the upper one. Wing brownish; veins brown, tegula dark brown, basicosta yellow, costal spine inconspicuous; vein Sc not curved bow-like; node of Rs bare on ventral and dorsal surfaces; veins R4+5 and M conspicuously close to each other distally; vein R4+5 straight; crossveins without obvious cloud; haltere brownish yellow. Legs entirely black, fore tibia without ad and median p, fore first tarsomere with numerous longish setae on ventral surface; mid coxa without any hooked spines or spine-like setae on lower and outer margins, mid femur with long and sparse av and pv rows in basal half, becoming gradually denser and shorter towards apex, av row comb-like in distal part, pv row becoming biserial in median part, mid tibia slightly swollen in distal half, with 2 ad, 2 pd and numerous slender hairs on ventral surface, the longest one about equal to mid tibia width, mid first tarsomere without basal tooth-like spines on ventral surface; hind coxa bare on posterior surface, hind femur with 4 long av in distal half, hind tibia with 1 or 2 av, 2 ad and 1 median d. Abdomen oval, depressed and flattened, black in ground colour, with light grayish brown pruinosity; syntergite 1+2 to tergite 5 each with 1 broad median vitta; sternite 1 with 4 or 5 hairs.

Female: Unknown.

Specimens examined: 1 male, China: Shanxi: Guangling: Haizi, 24.v.1983, Coll. M.F. Wang; 1 male, China: Liaoning: Xiuyan, Mt. Yaoshan, 400–800m, 19.v.2007, Coll. C.T. Zhang; 1 male, China: Xinjiang: Mt. Tianshan, 1600m, 11.vi.1960, Coll. F.C. Zhang.

Distribution: China (Shanxi, Liaoning, Xinjiang), Japan (Honshu), Norway, Sweden, Ireland, Great Britain, Denmark, Germany, Poland, Czech Republic, Switzerland, Austria, Hungary, Italy, Canada, United States.