The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history Author Gibbs, Jason Author Ascher, John S. Author Rightmyer, Molly G. Author Isaacs, Rufus text Zootaxa 2017 2017-11-21 4352 1 1 160 journal article 31367 10.11646/zootaxa.4352.1.1 543c4afc-4ffb-4e11-a858-a6d1d9745214 1175-5326 1063854 7C684128-FFA7-48AA-B395-B9C6BC39353A Bombus ( Thoracobombus ) pensylvanicus (DeGeer 1773) ( pensylvanicus group) County records: Alger , Allegan, Alpena, Arenac, Barry, Bay, Benzie, Berrien, Branch, Calhoun, Cass, Cheboygan, Chippewa, Clare, Clinton, Eaton, Gladwin, Gogebic, Hillsdale, Huron, Ingham, Ionia, Iosco, Isabella, Jackson, Kalamazoo, Kent , Lapeer, Lenawee, Livingston, Macomb, Manistee, Mason, Mecosta, Midland, Monroe, Muskegon, Newaygo, Oakland, Oceana, Otsego, Saginaw, Sanilac, Shiawassee, St. Clair, St. Joseph, Tuscola, Van Buren, Washtenaw, Wayne. Notes. No recent specimens examined. Bombus pensylvanicus is evidently a declining species in the northern extent of its historical range ( Grixti et al. 2009 ), but is still commonly seen in the south and western part of its range ( Cameron et al. 2011 ; many recent records at http://bugguide.net/node/view/65631).