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 Pasimachus obsoletus LeConte, 1846 Pasimachus obsoletus LeConte, 1846a: 148. Type locality: "ad flumen Platte, prope Rocky Mountains" (original citation). Three syntypes in MCZ [# 5462]. Pasimachus acuminatus Casey, 1913: 88. Type locality: "probably Colorado" (original citation). Holotype [by monotypy] in USNM [# 46889]. Synonymy established by Leng (1920: 47). Pasimachus vestigialis Casey, 1913: 89. Type locality: "New Mexico; El Paso and Marfa, Texas" (original citation). Three syntypes in USNM [# 46891]. Synonymy established by Leng (1920: 47). Pasimachus atronitens Casey, 1913: 89. Type locality: "San Bernardino Ranch and Douglas, Cochise Co[unty], Arizona" (original citation). Six syntypes [6 originally cited] in USNM [# 46892]. Synonymy established by Leng (1920: 47) . Distribution. This species is found from "Iowa" ( Baenninger 1950: 492) to southeastern Wyoming (Laramie County, CMNH), south to southeastern Arizona (Casey 1913: 89, as Pasimachus atronitens ) and Chihuahua in northern Mexico ( Baenninger 1950: 492). Records. USA : AZ, CO, IA, KS, NE, NM, OK, SD, TX, WY - Mexico Note. Baenninger (1950: 510) retained Pasimachus atronitens and Pasimachus acuminatus as questionable subspecies of Pasimachus obsoletus . Erwin (2011b: 51) treated Pasimachus atronitens as a valid species.