New species of the genus Trechus Clairville, 1806 from the Chinese Tien Shan (Coleoptera: Carabidae).

Five new species of the genus Trechus Clairville, 1806 are described from the eastern part of the Tien Shan mountains (China, Xinjiang-Uygur Autonomous Region): T. tsanmensis sp. n. from the Narat Mountain Range, left bank of the Zanma River; T. torgaut sp. n. from the upper course of the Kunges River and Narat Mountain Range (both species belong to the uygur species group, which is defined here); T. aghiazicus sp. n. from the Aghiaz River and Koeksu Basin, T. cratocephalus sp. n. from the Narat Mountain Range (both belong to the micrangulus species group); and T. saluki sp. n. from the mountains S of the Kunges River (belonging to the kashensis species group, also defined in the present paper). Some new data on the distribution of T.uygur Deuve, 1993 and T. kashensis Belousov Kabak, 2001 are given. The distribution of all known species of the uygur and kashensis groups is mapped. An identification key is provided to known species of the uygur group.