Mycomya pitta, 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 : 148-152

Mycomya pitta sp. n.

Figs. 13 A–E

Material studied. Holotype. ♂. MYANMAR, N.E. Burma, Kambaiti, 2000 m, 4.VI. 1934, Malaise (in MZH). Paratypes. Same data as holotype, 2 ♂♂ (in MZH); same data, but 31.III. 1934, 1♂ (in MZH); same data, but 9.VI. 1934, 1 ♂ (in MZH); same data, but 12–17. VI. 1934, 1 ♂ (in MZH).

Description. ♂. Head. Palp brownish, other mouthparts and face yellow, posterior parts of head brownish to brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 3.5x, 2nd flagellomere 2x, its width. Thorax. Pronotum yellow, with 3 long setae. Scutum yellow with 3 indistinct brownish longitudinal stripes. Anepisternum yellow. Preepisternum yellow, ventral half slightly darker. Scutellum yellowish, with 4 long setae. Laterotergite yellowish. Mediotergite light brownish, bare. Wing. Length 3.2–4.0 mm. Wing hyaline. Sc ending in R1 near middle of small cell, Sc1 missing. Apical part of Sc bearing 0–1 small setae. Small cell 1–1.5x as long as wide. Cu fork distal to M fork. M ratios: 0.93–0.97, 1.11–1.23. Cu ratios: 1.00– 1.02, 1.50–1.57. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter yellowish. Legs. Coxae and femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.78–0.84, bt2:t2 = 0.66, bt3:t3 = 0.62. Abdomen. Tergites brownish, 1–5 sometimes with slightly darker posterior margins, 6–7 brownish to brown, sternites paler than tergites. Hypopygium. Figs. 13 A–E: yellowish. Tergal part with two pairs of combs. Outer tergal combs with about 9 spines, base of outer combs relatively deeply bilobed. Inner tergal combs with about 8–9 slightly flattened spines. Tergal lateral appendage more than 4x as long as wide, its setose basal part at least 3x as wide as its long, narrow apical part bearing some slightly flattened, curved apical setae ( Fig. 13 C). Sternal submedian filament short, slightly curved, not reaching apex of sternal synsclerite. Gonostylus at least 4x as long as wide, apical part much wider, with 3 subapical teeth, 1 strong seta, basal part of gonostylus with a very long, strong basal spur and with small lateral membranous lobe about 1/3 of length of main branch of gonotylus ( Fig.13 D). Spur with 2 small dark apical teeth and 2–3 very long setae, about as long as the spur. Aedeagus with two rounded lobes.

Discussion. The male hypopygium of M. pitta resembles that of M. naja sp. n, but differs from it e.g. in the almost straight shape of the tergal lateral appendage ( Fig. 13 C), and in having a very short sternal submedian filament ( Fig. 13 B). The structure of the gonostylus of M. pitta is diagnostic in having a very small membranous lateral lobe, and a very strong spur with apical teeth and a few very long apical setae ( Fig. 13 D).

Etymology. The species name is a noun in apposition and refers to the elusive forest birds of the passerine genus Pitta Viellot.

Mycomya sanar sp. n. Figs. 14 A–F

Material studied. Holotype. ♂. E. NEPAL, Gupa Pokali (2900 m) 27°17'N, 87°30'E – Chouki (2700 m) 27°12'N, 87°28'E (holotype collected on the way between the two localities). July 16, 1972 J. Emoto leg. Kyushu Univ. Col. (in KUC). Paratypes (only ♂♂). Same data as holotype, 8 ♂♂, 1 ♀ (in KUC).

Description. ♂. Head. Palp and other mouthparts brownish, face yellowish, posterior parts of head brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere 4– 5 x, 2nd flagellomere 3x, its width. Thorax. Pronotum yellow, with 2–3 long setae. Scutum yellowish with fused brown longitudinal stripes, anterolateral corners yellow. Anepisternum and preepisternum yellow. Scutellum brownish, with 4 long setae. Laterotergite brownish to brown. Mediotergite brownish, bare. Wing. Length 4.5–4.9 mm. Wing hyaline. Sc ending in R1 near or distad of middle of small cell, Sc1 missing or very short. Apical part of Sc bearing 0–3 small setae. Small cell 1.5– 2 x as long as wide. Cu fork distinctly distal to M fork. M ratios: 0.83–0.97, 1.09– 1.27. Cu ratios: 0.85–1.06, 1.40–189. Small setae: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter yellowish. Legs. Coxae yellow to yellowish, femora yellow, tibiae and tarsi brownish to brown. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.82–0.86, bt2:t2 = 0.67–0.68, bt3:t3 = 0.55–0.56. Abdomen. Brownish to brown. Hypopygium. Figs. 14 A–F: yellowish. Tergal part with two pairs of combs. Outer combs widely separated from each other, both with 7–8 spines. Inner tergal combs with broad darker and lighter spines. Tergal lateral appendage long, slender, about 7x as long as wide and strongly curved, with one group of basal and another group of long, flattened, curved apical setae ( Fig. 14 D). Sternal submedian filament missing. Gonostylus about 4x as long as wide, apically wider, with 1 strong dark spine in its middle part, 3 subapical teeth and small membranous lateral lobe, about 1/3 of length of main branch of gonostylus ( Fig 4 E). Aedeagus wide, setose with two narrow, dark lobes ( Fig. 14 F). Female. Wing length 4.8 mm. Thorax yellow with brown median stripe on scutum and brown posterior part of mediotergite. Abdomen brown. Leg ratios: bt1:t1 = 0.81, bt2:t2 = 0.66, bt3:t3 = 0.56. Terminalia yellow.

Discussion. The diagnostic characters of the male hypoppygium of M. sanar include the long, narrow and strongly curved tergal lateral appendage having setae only on its basal and apical part ( Fig. 14 D), the lack of sternal submedian filament ( Fig. 14 B), and the short, wide gonostylus with a small membranous lateral lobe ( Fig. 14 E). Etymology. The species name is a noun in apposition and refers to the name of the Himalayan black bear in the Nepali language.

Mycomya unipectinata Edwards, 1927 Figs. 15 A–E

Mycomya unipectinata Edwards, 1927 . Edwards 1927:118.

Material studied. Holotype. ♂. SRI LANKA, N. Eliya Ceylon 9-I-22. Ceylon G. M. Henry B. M. 1925. 444. (in NHM; hypopygium was originally mounted and it is now stored in a glycerine in a microvial).

Description. ♂. Head. Palp and other mouthparts light brownish, face yellowish, posterior parts of head brown. Antenna brownish, scape, pedicel and base of 1st flagellomere yellow. Length of 1st flagellomere about 4x, 2nd flagellomere 2.5 x, its width. Thorax. Pronotum yellow, with 3–4 long setae. Scutum brownish with 3 brownish, fused, longitudinal stripes, anterolateral corners yellow. Anepisternum and preepisternum brownish. Scutellum brownish, with 4 long setae. Laterotergite brownish. Mediotergite brownish, bare. Wing. Length 4.0 mm. Wing hyaline. Sc ending in R1 slightly proximad of middle of small cell, Sc1 missing. Apical part of Sc bearing 7 macrotrichia. Small cell about twice as long as wide. Cu fork distal to M fork. M ratios: 1.07, 1.44. Cu ratios: 0.93, 1.47. Macrotrichia: M petiole: 0; M1: 0; M2: 0; Cu petiole: 0; Cu1: 0; Cu2: 0. Halter yellowish, apex brownish. Legs. Coxae and femora yellow, tibiae and tarsi brownish. Coxa 2 without spur. Leg ratios: bt1:t1 = 0.79, bt2:t2 = 0.68, bt3:t3 =?. Abdomen. Brownish. Hypopygium. Figs. 15 A–E: yellow. Tergal part with two pairs of combs. Outer combs indistinct and rudimentary, both with only 3–4 spines, inner combs widely separated from each other, both with about 12 spines. Tergal lateral appendage with broad, setose basal part about 1.5x as wide as narrow subapical part; a narrow apical part with few long flattened apical setae ( Fig. 15 C). Gonostylus narrow, about 7x as long as wide, with 3 teeth, 1 apical seta and membranous lateral lobe about 2/3 of length of main branch of gonostylus ( Fig. 15 D). Aedeagus with two narrow lateral lobes.

Discussion. Hypopygium of M. unipectinata differs from the other species of the subgenus Mycomyopsis in having only one complete pair of tergal combs as indicated by its Latin name. The other pair of combs is rudimentary and consists only of few spines ( Fig. 15 A). The shape of the tergal lateral appendage is also diagnostic ( Fig. 15 C). The holotype was collected at the hill station of Nuwara Eliya, surrounded by tea-growing country, at the altitude of about 1900 m in January.

Acknowledgements

I wish to thank the following persons, who placed their material or information at my disposal: O. Biström (MZH, Helsinki), B. Pitkin (NHM, London), J. Poirier (CNC, Ottawa), T. Saigusa (KUC, Ropponmatsu, Japan), H. Shima (KUC), K. K. Tiwari (Calcutta), and J. R. Vockeroth (CNC). I am very grateful to K. Heliövaara (University of Helsinki) and P. Vilkamaa (MZH) for technical assistance. P. H. Kerr (Sacramento) and an anonymous referee gave valuable comments on the manuscript. My grateful regards are also due to P. Chandler (Melksham, UK) for his comment on the nomenclatural problem of the generic name Lycomya , which was later noticed by A. Ö. Koçak and M. Kemal (Ankara).

Figures

FIGURE 4. Mycomya sachak sp. n., male hypopygium. A – B tergal and lateral views, C apex of tergal spur, lateral view, twice enlarged, D tergal lateral appendage, twice enlarged, E gonostylus, twice enlarged, F apex of aedeagus, lateral view, twice enlarged. Scale 0.2 mm.

FIGURE 13. Mycomya pitta sp. n., male hypopygium. A – B tergal and sternal views, C tergal lateral appendage, twice enlarged, D gonostylus, twice enlarged, E tergite 8. Scale 0.2 mm.

FIGURE 14. Mycomya sanar sp. n., male hypopygium. A – C tergal, sternal and lateral views, D tergal lateral appendage, twice enlarged, E gonostylus, twice enlarged, F apex of aedeagus, sternal view, twice enlarged. Scale 0.2 mm.

FIGURE 15. Mycomya unipectinata Edwards, male hypopygium. A – B tergal and sternal views, C tergal lateral appendage, twice enlarged, D gonostylus, twice enlarged, E tergite 8. Scale 0.2 mm.