(Figs 1-8)

https://zoobank.org/ urn:lsid:zoobank.org:act: 9105D183-1313-4CCC-90EF-1ADBD83EB75D

Diagnosis. In the keys to Palaearctic species (Schmitz, 1943) males runs to couplet 20, lead 1 to T. dudai (Schmitz, 1918) on page 139 and females to couplet 19 at the same page. The males clearly differ on the hypopygium (Figs 3-4) and the females – on the sternite 7 (Fig. 7), plus in both sexesof the new species costa thickens apically (C2 and C3).

Male. A brown species. Head dark brown. Frons brown, little broader than long (1.2:1), with about sixteen hairs and dense, very fine, microsetae. Supra-antennals less than half length of antials. Anterolateral bristles a little higher on frons than antials. Pre-ocellars slightly lower on frons than mediolaterals and all four bristles about equidistant. Antenna: postpedicel brown, rounded; arista subapical, short pubescent. Palps brown, with about 5-6 bristles, apical one longer and stronger. Thorax brown. 3 notopleurals (Fig. 1). Scutellum with a single pair of long bristles only. Wing brownish, veins brown (Fig. 2). Costa thickens apically (sections 2 and 3 of costa - C2 and C3). Sc reaches vein 1. Vein 2 complete. One hair at base of R4+5. Anal vein short, not reaching wing margin. A single axillary bristle. Haltere brown. Costal index = 0.45, costal ratios = 1.8:0.8:1. Legs brown, fore tibia with 1 short anterodorsal proximal bristle, mid tibia with 2 proximal bristles (anterodorsal one twice long than posterodorsal), hind tibia with 1 anterodorsal proximal bristle. Abdomen brown, tergites with short hairs. Venter brownish.

Hypopygium (Figs 3-4): left epandrial process (Fig. 3) large, elongated, pointed apically, haired with 3 stronger hairs near the base; right epandrial process (Fig. 4) about twice shorter, haired. Body length 1.5- 1.8 mm.

Female. Head similar to male, but the labrum is slightly larger (Fig. 5). Thorax as male (Fig. 6). Abdominal tergites brown with short hairs. Venter paler brown with hairs below on segments 3-6 near the rear margin and on flanks, especially on segments 4-5. Sternite 7 as Fig. 7. Legs similar to male. Wing as Fig. 8, similar to male. Haltere brown. Costal index = 0.46, costal ratios = 1.5:0.8:1. Body length 3.0- 3.2 mm.

Material examined. Holotype female, Kyrgyzstan (Kyrgyz Republic), Tien Shan Mts, Kakshaal-Too Range, Kok-Kyya River Valley, 40.883444N, 76.532944E, 3050 m, 17 August 2010, high-mountain grass society near a river, N. Simov. Paratypes (same collector): male, Tien Shan Mts, Kakshaal-Too Range, above Kok-Kyya River Valley, 40.804750N, 76.471861E, 3600 m, 16 August 2010, high-mountain grass society/rocks; 2 males, 1 female, Tien Shan Mts, Kakshaal-Too Range, Kol-Suu Lake, 40.704694N, 76.389389E, 3500 m, 15 August 2010, high-mountain grass society. All the material deposited in the author’s collection in the National Museum of Natural History, Sofia.

Etymology. Named after the Bulgarian entomologist Dr Nikolay Simov who collected the material.

Habitat. The type specimens were collected from high-mountain grass societies (above 3000 m: Figs 9-10).

Distribution. Known only from its type locality, the Tien Shan Mts, Kakshaal-Too Range, At-Bashi District, Kyrgyz Republic. It is likely that this species can also be found in surrounding areas of the mountain.