Trechus Species

Deuve, Thierry, Kavanaugh, David H. & Liang, Hongbin, 2016, Inventory of the Carabid Beetle Fauna of the Gaoligong Mountains, Western Yunnan Province, China: Species of the Tribe Trechini (Coleoptera: Caraboidea), with Descriptions of Four New Genera, One New Subgenus and 19 New Species., Proceedings of the California Academy of Sciences 63 (12), pp. 341-455 : 381

Key for Identification of Adults of Trechus Species of the Gaoligong Shan Region

1. Size larger (BL = 4.2 to 5.0 mm), fully-winged; elytra elongate, recurrent stria terminated abruptly on interval 6; preapical seta absent or vestigial and inserted near elytral apex, also without a third discal seta in apical one-fouth of elytra................ T. indicus Putzeys Size varied, but generally smaller (BL = 3.3 to 4.7 mm), elytra short, recurrent stria continuous anteriorly with stria 5 or 7, preapical seta present and inserted near stria 2 in a subdiscal position or as third discal seta near stria 3 in apical one-fourth of elytra ( Trechus qiqiensis Group)................................................................... 2