Two New Species of the Genus Trechus Clairville, 1806 from Gansu Province of China (Coleoptera, Carabidae)

Resumo

A new species group of Trechus Clairville, 1806 has been established to include two new rather isolated species of the genus from southern Gansu, China. Both species were collected in the high mountains located WSW of Longnan (= Wudu) City: T. glebisp. n. (from the valley, situated 8–11 km SE of Guazigou Village) and T. rhombussp. n. (from the sources of the Yantanghe River). In their external characters, members of the glebi-species group are characterized, first of all, by the Epaphius-like robust appearance and the posterior position of the preapical pore on elytra typical of the true Trechus.