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 Protandrena ( Pterosarus ) aestivalis (Provancher, 1882) Counties: Aitkin, Anoka, Beltrami, Benton, Big Stone, Carlton, Carver, Clearwater, Hennepin, Isanti, Polk, Ramsey, Rock, Saint Louis, Sherburne, Washington , Winona. Comments: There are two subspecies of Pr. aestivalis : Pr. a. aestivalis and Pr. a. muesbecki . The specimens in Minnesota contain forms that match both subspecies due to variation in the face markings. It is unclear whether the subspecies represent distinct taxa.