A checklist of the bees (Hymenoptera: Apoidea) of Minnesota Author Portman, Zachary M. lanex173@umn.edu Author Gardner, Joel clickbeetle3364@gmail.com Author Lane, Ian G. lanex173@umn.edu Author Gerjets, Nicole nicole.gerjets@state.mn.us Author Petersen, Jessica D. nicole.gerjets@state.mn.us Author Ascher, John S. dbsajs@nus.edu.sg Author Arduser, Mike arduser.michael@gmail.com Author Evans, Elaine C. lanex173@umn.edu Author Boyd, Crystal nicole.gerjets@state.mn.us Author Thomson, Robin lanex173@umn.edu Author Cariveau, Daniel P. lanex173@umn.edu text Zootaxa 2023 2023-06-16 5304 1 1 95 http://dx.doi.org/10.11646/zootaxa.5304.1.1 journal article 56537 10.11646/zootaxa.5304.1.1 b856cb6e-4795-4028-8c84-240be130e150 1175-5326 8048569 B5EED376-4655-4292-A52F-22567196D94D Bombus ( Psithyrus ) variabilis (Cresson, 1872) Counties: Rock. Comments: This globally rare and declining species is known in Minnesota from a single female from the southwesternmost corner of the state, though it was likely more widespread in Minnesota since it has also been recorded from Fargo, North Dakota ( Stevens 1948 ) and Brookings County, South Dakota ( Martens et al. 2022 ). Bombus variabilis is potentially extinct or extirpated from the United States . The most recent records from the US that we have personally confirmed are from over 20 years ago in 1998 and 1999 ( Missouri , St. Clair Co.: Wah-Kon-Tah Prairie: 1 ♁, 20 Sep 1998 , J. Silkel leg., determined by M. Arduser; Missouri , Scott Co.: Hwys. H and C intersection, northwest corner, wetland on the Mississippi River alluvial plain: 1 ♀ , 26 Aug 1999 , at Asclepias incarnata flowers, Arduser coll., determined by M. Arduser). This species is IUCN-listed as critically endangered ( Hatfield et al. 2015 ) and recently it had a USFWS positive 90-day finding ( U.S. Fish and Wildlife Service, 2022 ) and awaits a listing decision. Minnesota material examined: Rock Co. : Mound Springs State Park [now Blue Mounds State Park]: 1 ♀ , 15 Sep 1948 , H.E. Milliron leg., determined by R . Fischer , confirmed by J. Gardner and Z. Portman . Subgenus Pyrobombus Dalla Torre