Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 74. (Budapest 1982)

Shilenkov, V. G.: Some notes on South Siberian Trechini (Coleoptera, Carabidae) with descriptions of three new species

pores situated at about one-fifth from base and slightly behind middle ; intervals flat, apical carina prominent. Ventral surface smooth, anal sternit of male with two setae on hind margin. Legs fairly stout, tibiae only with trace of groove on external face near apex. Aedeagus (fig. 13) massive, weakly curved, with characteristic thickening at apex, inner sac without copulatory piece, armed with two spines, each situated near to the other and groups of small teeth. Microsculpt u r e of head isodiametric, more distinct on vertex, on disc of pronotum composed of short transverse meshes, which near margins becoming coarser and almost isodiametric; microsculpture of elytra consisting of very narrow transverse meshes, almost disappearing on disc. — Length: 3.31-3.60 mm. Width: 1.31-1.44 mm. From other species easily different in structure of aedeagus, large body with pale colour, form of pronotum, etc. Material. Holotype rf (ZIL) and Paratype rf (HNHM) : mountain range Tannu-Ola, Mt. Hadynbaj, near village Torgalyk, mountaineous tundra, under stones, 23. VI. 1962, leg. I. V. STEBAEV. Paratype rf (ZIL): Western Tannu-Ola, source of Kadyi river, mountaineous tundra, 2. VIII. 1979, leg. B. A. KOROTYAEV. The species is named after my friend, B. A. KOROTYAEV, an indefatigable explorer of Tuvinian beetles. Pitchy-brown, head almost black, margins and suture of elytra, mandibles and labrum somewhat paler, appendages pale-testaceous, 3-5. segments of antennae slightly infuscated. Head rather wide, with entire deep frontal furrows subangulate at middle; eyes moderately convex, with small ommatidia; temporae fairly convex, about half as long as eyes. Antennae rather short, extending beyond base of pronotum by two apical segments; mentum tooth emarginate at apex. Pronotum moderately tranverse and convex, 1.25-1.27 times as wide as head, 1.32-1.37 times as wide as long, widest in its first thirds; ratio of greatest width to width of apex 1.32-1.37, that to width of base 1.24-1.25, lateral sides moderately rounded, shortly sinuated before small rectangular hind angles; front angles slightly advanced and rounded; median line distinct; basal fovea shallow, smooth, basal and apical areas longitudinally strigose. Elytra oval, moderately convex, 1.39-1.46 times as wide as pronotum, 1.45-1.52 times as long as wide, widest slightly behind middle; striae 1-3 entire, rather deep and almost smooth, 4. shallow and short, 5. only trace, 6. absent, 7. scarcelly visible in oblique light; stria 3 with two setiferous dorsal pores situated at about one-fifth from base and behind middle; recurrent stria feebly curved and joining stria 5 ; intervals flat, apical carina weakly prominent. Ventral surface smooth, anal sternite in male with two setae on hind margin. Legs fairly stout, fore tibiae with a deep groove on external face. Aedeagus (fig. 10) moderately curved, with small sagittal aileron and small "button" at apex; inner sac with copulatory piece forming long bar thickened at apex and tufts of teeth. Microsculpture of head isodiametric, more distinct on vertex, very weak on disc of pronotum, composed here of long transverse meshes near margins becoming coarser and almost isodiametric; disc of elytra practically without microsculpture, on margins consisting of fine transverse lines. — Length: 2.89-2.94 mm. Width : 1.20-1.23 mm. Easily distinguishable from other Siberian Trechus by dark colour and characteristical structure of aedeagus. Material. Holotype, rf and Paratype, rf (ZIL) : West Sajan Mts., southern slope of Oiskij mountain range, in the vicinity of village Olenja River, subalpine meadows, 31. V. 1962, leg. V. G. MORDKOVITSCH. I wish to name this species in honour of DR. V. G. MORDKOVITSCH. Trechus (Trechus) mordkovitschi sp. n. Figs 14-17. Antennae. 14: Trechus mordkovitschi sp. n.; 15: Trechus montanus MÖTSCH.; 16: Trechus korotyaevi sp. n. ; 17: Trechus hangaicus sp. n.