Cychrus (Stenocantharus), Gistel, 1834

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 165

Subgenus Stenocantharus Gistel, 1834

Stenocantharus Gistel, 1834: 1. Type species: Cychrus angusticollis Mannerheim, 1823 by monotypy. Etymology (see Gistel 1829: 1068). From the Greek stenos (narrow) and cantharos (scarab) [masculine]. Note. The name Stenocantharus was first introduced by Gistel (1829: 1068) for " Cychrus debilis Dejean," a species not available at the time.

Pemphus Motschulsky, 1866: 312. Type species: Cychrus velutinus Ménétriés, 1843 designated by Géhin (1876b: 114). Synonymy established by Csiki (1927: 322).

Diversity.

Four species restricted to the Pacific coastal and western montane regions of North America.

Identification.

Van Dyke (1944) and Gidaspow (1973) revised the species then placed in this subgenus. Gidaspow (1973) provided a key for their identification.