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 Subgenus Crossonychus Chaudoir, 1848 Crossonychus Chaudoir, 1848: 98. Type species: Dromius viridis Dejean, 1831 by monotypy. Etymology. From the Greek crossos (fringe) and onyx , - ychos (claw) [masculine]. Lobius Motschulsky, 1864: 230. Type species: Dromius viridis Dejean, 1831 designated by Lorenz (1998: 108). Peronoscelis Chaudoir, 1876d: 56. Type species: Tetragonoderus figuratus Dejean, 1831 designated by Bousquet and Larochelle (1993: 266). Synonymy established by Ball (2000: 190). Etymology. From the Greek perone (pin, something pointed) and scelos (leg) [feminine]. Diversity. Western Hemisphere, with about 40 species in the Nearctic (five species, one of them adventive) and Neotropical (about 40 species) Regions. One South American species ( Tetragonoderus undatus Dejean) is adventive in Australia (Moore 1976). The species have been arrayed in two species groups by Ball (2000: 190), the figuratus and intersectus groups; only the last one is represented in North America.