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 Psydrus LeConte, 1846 Psydrus LeConte, 1846a: 153. Type species: Psydrus piceus LeConte, 1846 by monotypy. Etymology. From the Greek psydros (lying) [masculine]. Monillipatrobus Hatch, 1933c: 118. Type species: Monillipatrobus punctatus Hatch, 1933 (= Psydrus piceus LeConte, 1846) by original designation. Synonymy established by Hatch (1935: 118). Etymology. From the Latin monile (necklace, string of beads, by extension moniliform) and the generic name Patrobus [ q.v .], alluding to the shape of the antennae ("antenna ... with the segments ... submoniliform") of adults of the species which Hatch placed in the tribe Patrobini [masculine]. Diversity. One North American species. Identification. The species was treated in Lindroth's (1961a: 175-176) monograph.