Mucha tzokotucha Ozerov

Li, Xuankun & Yang, Ding, 2014, Mucha Ozerov and Ortalischema Frey newly recorded from China with descriptions of two new species (Diptera, Sepsidae), Zootaxa 3815 (2), pp. 249-262 : 253-254

2. Mucha tzokotucha Ozerov

( Figs. 2 , 6 )

Mucha tzokotucha Ozerov, 1992c: 148 (Mucha) . Type-locality: Ba Vi 70 km NW Hanoi ( VIETNAM: Hanoi); Holotype ♂, in ZISP.

Redescription. Male. Body length 4.5 mm, wing length 3.2 mm.

Head mostly black; frons shiny and blackish brown apically; face almost brown; facial orbit black to blackish brown; gena yellowish brown; face and occiput thinly pruinose. 1 oc, 1 vti, 1 vte, 1 pvt, or vestigial. Vibrissal angle with 1 strong and 1 weak setae; genal margin with 7 peristomal setae in a row, and with 1 strong seta at lower margin near postgena. Antenna almost yellow; first flagellomere distinctively elongated, 2.4 times longer than wide, pubescent; arista brown, long plumose on dorsal side. Proboscis yellow with brown setulae; palpus yellow except apex yellowish brown, with black setulae.

Thorax mostly blackish brown, except protonotopleural lobe yellowish brown ventrally and propisternum yellowish brown. Thorax mostly pruinose, except anepisternum glossy and katepisternum shining anteriorly. 1 pprn, 2 npl, 2 dc, 1 sa, 1 pa, 1 m, 1 b sc, 1 sc. Legs mostly blackish brown, except fore and mid coxae brown with blackish brown vertical band; hind femur yellow at base; fore tibia entirely yellow, mid and hind tibiae yellow at apical 1/2, and all tarsomeres 1-3 yellow. Fore femur ventrally with group of 3 pv setae, 1 v seta, and 1 weak av seta near middle, followed by small tubercle frontward bearing 2 pv setae, and with 7 ventral setulae on distal 1/3; mid and hind femora without any distinct setae or spines; fore tibia ventrally concave at middle ( Figs. 2 A, 6A, 6B). Wing hyaline, slightly tinged brown, without dark spot near apex; veins dark brown; anal vein 8 times as long as width of bm cell; alula not developed, about 1.5 times as wide as bm cell, with microtrichiae marginally. Halter white, but blackish brown basally.

Abdomen mostly brown and shiny, except syntergite 1+2, tergites 3-5 and syntergite 7+8 brownish yellow laterally and apically. Syntergite 1+2 to tergite 5, and syntergite 7+8 normal, tergite 6 missing. Syntergite 1+2 with one pair of striking setae; tergites 3-5 each with pair of marginal and dorsal setulae. Sternite 3 longitudinally elongated, sternite 4 oval, each with setulae ( Fig. 2 B). Epandrium with one pair of strong dorsal setae and 3 pairs of posterior setae. Surstylus apically tapering, not bifurcate. Relative length ratio of epandrium and surstylus: de: ade: ave: as = 1: 1.74: 2.83: 1.30; de: pde: pve: ps = 1: 1.83: 2.22: 1.17 ( Figs. 2 C, 6C).

Female. Unknown.

Speciments examined. 1 ♂ China, Jangxi, Jinggangshan, Jingzhushan Mt., 600 m, 2012. X. 10, Ding Yang.

Distribution. Oriental: China (Jiangxi), Vietnam. New to China.

Remarks. This species is recorded from China for the first time. This species can be separated from other species of Mucha by the following features: vibrissal angle with 1 strong and 1 weak setae; fore tibia ventrally concave at middle.

Figures

FIGURE 2. Photographs of Mucha tzokotucha Ozerov, male. A, left lateral view; B, abdomen, ventral view; C. genitalia, left lateral view; D. genitalia, posterior view. Scale bars = 1 mm.

FIGURE 6. Mucha tzokotucha Ozerov, male. A, left fore femur and tibia, anterior view; B, left fore femur, posterior view; C, genitalia, left lateral view; D, genitalia, posterior view. Scale bars = 0.1 mm.