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 Diacheila arctica amoena (Faldermann, 1835) Blethisa amoena Faldermann, 1835: 358. Type locality: "montibus Altaicis [Mongolia]" (original citation). Syntype(s) probably in ZILR. Diachila subpolaris LeConte, 1863c: 2. Type locality: "Hudson's Bay" (original citation). One syntype in CMNH (Lindroth 1954b: 121). Synonymy established by Lindroth (1954b: 122). Diachila americana Motschulsky, 1864: 195. Type locality: "Amer [ique] arctique. Hudson Bay" (original citation). Syntype(s) location unknown (possibly in ZMMU though not listed in Keleinikova 1976). Synonymy established with the name Diachila subpolaris LeConte by Horn (1870a: 70). Distribution. This Holarctic subspecies is known in Asia from Kazakhstan, Mongolia, and eastern Siberia (Goulet 2003: 206) and in the Nearctic Region from a few localities in Alaska, Northwest Territories (Lindroth 1961a: 102), northern Alberta (Bourassa and Wood 2011: 144; Fort McMurray area, Gerald J. Hilchie pers. comm. 2009), and Labrador (Lindroth 1961a: 102). Fossil remnants, dated between 10,400 and 17,000 years B.P., have been unearthed in Cape Breton Island, Nova Scotia (Miller 1997: 250) and Iowa (Schwert 1992: 76). Records. CAN : AB, LB, NT USA : AK - Holarctic Note. The nominotypical subspecies is found in northern Europe and eastern Siberia. Figure 14. Diacheila arctica amoena (Faldermann). This subspecies is widely distributed over the arctic and subarctic regions of the Northern Hemisphere, ranging from Labrador to Kazakhstan, but populations seem to be highly localized. The German coleopterist Franz Faldermann found the adults of this taxon "pleasant" hence his scientific name amoena . The nominotypical subspecies ranges from the Nordic regions of Scandinavia to the Komi Republic in northern European Russia.