Mycomya cissa , Väisänen, Rauno, 2013

Väisänen, Rauno, 2013, New Mycomya species from the Himalayas (Diptera, Mycetophilidae): 3. Subgenera Cesamya and Mycomyopsis, Zootaxa 3737 (2), pp. 129-153: 132-133

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Mycomya cissa

sp. n.

Mycomya cissa  sp. n.

Figs. 1View FIGURE 1 A –F

Material studied. Holotype. ♂. MYANMAR, N.E. Burma, Kambaiti, 1800 m, 7.VI. 1934, Malaise (in MZH). Paratypes. Same data as holotype, 2 ♂♂ (MZH).

Description. ♂. Head. Palp brownish, other mouthparts and face yellowish, posterior parts of head brownish. Antenna brownish, scape, pedicel and base of 1 st flagellomere yellow. Length of 1 st flagellomere about 4 x, 2 nd flagellomere 2.5 x, its width. Thorax. Pronotum yellow, with 3–4 long setae. Scutum yellowish with 3 indistinct brownish longitudinal stripes. Anepisternum yellow. Preepisternum yellow, ventral half brownish. Scutellum brownish, with 4 long setae. Laterotergite brownish. Mediotergite brownish, bare. Wing. Length 3.6–3.8 mm. Wing hyaline. Sc ending in R 1 proximad of middle of small cell, Sc 1 missing. Apical part of Sc bearing no small setae. Small cell shorter than its width. Cu fork slightly distal to M fork. M ratios: 0.75–0.90, 1.03–1.21. Cu ratios: 0.86 –1.00, 1.37–1.56. Small setae: M petiole: 0; M 1: 0; M 2: 0; Cu petiole: 0; Cu 1: 0; Cu 2: 0. Halter apically brownish. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt 1:t 1 = 0.79–0.81, bt 2:t 2 = 0.69–0.70, bt 3:t 3 = 0.60. Abdomen. Tergites brownish, sternites slightly paler. Hypopygium. Figs. 1View FIGURE 1 A –F: yellowish. Tergal part with 1 very wide outer comb of short spines. Some spines also between wide outer comb and 2 inner combs ( Fig. 1View FIGURE 1 C). Inner combs wide, each with 12–14 spines. Only lateral parts of base of outer comb with some setae, its median part bare. Dark inner spur of tergal part apically blunt. Tergal lateral appendage long, relatively slender, about 4 x as long as wide, setose, with some slightly flattened, relatively short (slightly longer than width of tergal lateral appendage) subapical setae on inner side ( Fig. 1View FIGURE 1 D; also Fig. 1View FIGURE 1 A, on both sides of outer comb). Sternal submedian filament ( Fig. 1View FIGURE 1 B, narrow basal extensions of deeply bilobed sternal synsclerite along medial side of its both lobes) relatively short, hardly reaching apex of sternal synsclerites, slightly curved. Gonostylus tapering towards its apex, with 4 subapical teeth, 1 strong apical seta, and relatively large membranous lobe only slightly shorter than main branch of gonostylus ( Fig. 1View FIGURE 1 E). Aedeagus long, slender, with 2 very long slender lateral appendages extending slightly beyond its apex ( Fig. 1View FIGURE 1 B, mid-upper part).

Discussion. Mycomya cissa  differs readily from the other species of the subgenus Cesamya in the unique shape and structure of the tergal combs formed by stronger spines ( Figs. 1View FIGURE 1 A, 1 C) than in the other species. Other diagnostic features include tergal lateral appendage ( Fig. 1View FIGURE 1 D) lacking the curved flattened setae and sternal submedian filament not extending beyond the apex of the sternal synclerite ( Fig. 1View FIGURE 1 B).

Etymology. The species name is a noun in apposition and refers to the green magpie (genus Cissa  F. Boie).