Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico Author Bousquet, Yves Agriculture and Agri-Food Canada, Central Experimental Farm, Ottawa, Ontario, Canada bousquety1@yahoo.com text ZooKeys 2012 2012-11-28 245 1 1722 http://dx.doi.org/10.3897/zookeys.245.3416 journal article http://dx.doi.org/10.3897/zookeys.245.3416 1313-2970-245-1 FFFF52503A0AFF882450FFB66D45FF8E 578462 Genus Promecognathus Chaudoir, 1846 Promecognathus Chaudoir, 1846: 524. Type species: Eripus laevissimus Dejean, 1829 by monotypy. Etymology (original). From the Greek promeces (advanced, in front of, by extension elongate) and gnathos (jaw), alluding to the elongate mandibles (" mandibulae longissimae ") of the adults [masculine]. Diversity. Two species restricted to western North America. Identification. Lindroth (1961a: 125-128) commented on the structural differences between the two species. Taxonomic Note. The status of the two forms as distinct species is questionable in my opinion. Van Dyke (1925: 123) considered the two forms as conspecific.