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 Polpochila Solier, 1849 Melanotus Dejean, 1831: 698 [junior homonym of Melanotus Eschscholtz, 1829]. Type species: Melanotus flavipes Dejean, 1831 designated by Hope (1838: 111). Etymology (original). From the Greek melas (black) and notos (back, dorsum), alluding to the coloration of the adults [masculine]. Polpochila Solier, 1849: 217. Type species: Polpochila parallela Solier, 1849 (= Melanotus chilensis Chaudoir, 1837) by monotypy. Synonymy established by LeConte (1869b: 248). Etymology. Unknown [feminine]. Cratocara LeConte, 1863b: 11. Replacement name for Melanotus Dejean, 1831. Etymology. From the Greek cratos (strength) and cara (head) [feminine]. Diversity. About 25 species in the Western Hemisphere arrayed in two subgenera: Phymatocephalus (two species) and Polpochila s.str. (23 species). Identification. Negre (1963) revised the species, including all three found in North America, known at the time.