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

Trechus (Trechus) a 1 monius REITTER, 1903 Trechus almonius REITTER, 1903: 2 (type locality: source of Irkut). Trechus (s. str.) almonius, JEANNEL, 1927: 479, 482, fig. 1123. Trechus (s. str.) almonius, CSIKI, 1928: 274. Trechus (s. str.) almonius, JEANNEL, 1962: 91, 92, fig. 7. Trechus almonius, SHILENKOV, 1979: 40. Distribution. So far known only from East Sajan (mountain range Tunkinskije Goltzy). Material. Burjatskaja ASSR: source of Irkut, mountain range Tunkinskije Goltzy, Mt. Hulugaisha, 2700 m, mountaineous tundra, under large stones, 23-30. VI. 1974. leg. V. G. SHILENKOV, 8 ex. (ISU, ZIL). Taxonomical remarks. In his original description Reitter mentioned two type localities: "Quellgebiet des Irkut, nördl. Mongolei". The specimen from the first locality was revised by JEANNEL (1927: 482) and as he has written, it is deposited in the Zoological Department of the Natural History Museum, Vienne. This specimen must be considered as type of T. almonius REITT. (sensu JEANNEL, 1927). The specimen from the second locality is now preserved in HNHM. It essentialy differ from typical East-Sajanian specimens and described below as new species. Trechus (Trechus) hangaicus sp. n. Uniformly piceous, appendages pale testaceous. Head slightly thickened, with deep frontal furrows, which are subangulate at level of front and hind margins of eyes; eyes small and flat, not prominent, scarcely longer than weakly protrudent temporae. Pronotum somewhat cordiform, feebly convex, 1.26 times as wide as head, 1.33 times as wide as long, widest at about fore quarter; ratio of greatest width to width of apex 1.26, that to width of base 1.41 ; lateral sides very narrow reflexed, strongly rounded near apex, more moderately in hind half, scarcely sinuate before obtuse, rounded at apex hind angles; front margin straight, 1.12 times as wide as basal margin, front angles rounded, absolutely not prominent; median line distinct; basal fovea shallow, flat and smooth, basal area longitudinally rugouse. Elytra oval, feebly convex, 1.63 times as wide as pronotum, 1.41 times as long as wide, widest behind middle; shoulders strongly rounded; 5 visible shallow and indistinct punctate striae, 2-5. disappeared near shoulders; scutellar striole very short; recurrent stria deep, joining stria 5; intervals flat, apical carina strongly prominent. Microsculpture on disc of head indistinct, near eyes weak and slightly transverse, on vertex isodiametric; on disc of pronotum consists of very dense transverse lines, forming long meshes, becoming more coarse near margins, almost isodiametric in basal fovea; on elytra very weak, consisting of dense transverse lines with light tendency to forming meshes. Aedeagus (fig. 12) thin and narrow, weakly curved, with large sagittal aileron, apical hook short and somewhat curved dorsaly; copulatory piece forming long bar, armed small teeth at apex. — Length: 3.17 mm, Width: 1.30 mm. Material. Holotype rf (HNHM), "Nordl. Mongolei, Changai, Leder" (syntype of T. almonius REITT.). Trechus (Trechus) korotyaevi sp. n. Uniformly pale-brown, without metallic lustre, appendages paler, eyes blackish-brown. Head relatively narrow, with distinct frontal furrows subangulate at level of frontal margins of eyes; eyes small and flat with fairly rough ommatidia, temporae feebly protrudent, gently sloping, about as long as eyes. Mandibles stout, right one with narrow sharp retinaculum, slightly bended forward; labrum emarginate at apex. Antennae rather short, extending beyond base of pronotum by two apical segments. Mentum tooth short and wide, emarginate at apex. Pronotum feebly cordiform and convex, 1.20-1.25 times as wide as head, 1.27-1.31 times as wide as long, widest at about two-thirds from base; ratio of greatest width to width of apex 1.30-1.33, that to width of base 1.27-1.37; lateral sides narrow reflexed, moderately rounded, feebly sinuate before slightly obtuse hind angles; front angles rounded and almost not advanced; median line distinct, deeper at base of pronotum, basal fovea shallow, smooth, basal area longitudinally strigose. Elytra oval, moderately convex, 1.541.66 times as wide as pronotum, 1.44-1.50 times as long as wide, widest near middle; shoulders rounded but distinct; striae shallow, distinct but weakly punctate, 1-3. entire, 4-5. dissappeared near shoulders, 6-7. faint at apex of elytra (visible only in oblique light); stria 3 with two setiferous dorsal