The Trechus solhoeyi group Diagnosis: Head with frontal furrows deep, strongly curved at middle. Frons and supraorbital areas strongly convex. Temples smooth. Mandibles normal. Pronotum subcordate, with hind angles well produced. Pronotal base rectilinear in middle and with outer fifth slightly curved anteriorly. Pronotal basal transverse depression diffuse limited towards disc; laterobasal foveae broadly developed. Pronotal median line distinct, deeper near base. Hind wings reduced to small stubs. Humerus broadly rounded. Each elytron with parascutellar seta, preapical seta and two discal setae on third interval, with anterior discal seta located on stria III at the end of the anterior elytral quarter, and with middle dorsal seta located on stria III somewhat behind elytral middle. Stria VIII distinctly impressed between fifth and sixth and between seventh and eighth umbilicate pores, and reduced between sixth and seventh pores. Recurrent elytral preapical sulcus deeply impressed and directed to the end of the fifth stria. Ventral surface smooth. Legs short, with moderately thick femora and relatively thin tibia and tarsi; protibiae slightly dilated towards apices, hardly bowed, each without a longitudinal groove on external surface. Two basal protarsi of male dilated, dentoid at the inner apical border. Aedeagal median lobe moderately large, with basal bulb average and strongly bent downwards, with basal velum moderately developed, and with terminal lamella not hooked at tip. Internal sac with sclerotized portion tripartite, extending almost half of length of median lobe; external folding lobes in dorsal view large and bilaterally symmetrical. Parameres average, both with four setae at tip; right paramere almost as long as left one. Species included: Monotypic: Trechus solhoeyi sp. n. (South Central Tibet).

Published as part of Schmidt, Joachim, 2009, Taxonomic and biogeographical review of the genus Trechus Clairville, 1806, from the Tibetan Himalaya and the southern central Tibetan Plateau (Coleoptera: Carabidae: Trechini) 2178, pp. 1-72 in Zootaxa 2178 (1) on page 41, DOI: 10.11646/zootaxa.2178.1.1, http://zenodo.org/record/5312276