Bombus (Psithyrus) citrinus (Smith 1854) ( citrinus group)

County records: Alger, Allegan, Alpena, Antrim, Arenac, Barry, Bay, Berrien, Calhoun, Cass, Cheboygan, Chippewa, Clinton, Delta, Dickinson, Emmet, Genesee, Gladwin, Grand Traverse, Gratiot, Hillsdale, Huron, Ingham, Ionia, Isabella, Jackson, Kalamazoo, Kalkaska, Kent, Keweenaw, Lake, Lapeer, Lenawee, Livingston, Luce, Mackinac, Macomb, Marquette, Mecosta, Menominee, Midland, Missaukee, Monroe, Montcalm, Muskegon, Newaygo, Oakland, Oceana, Osceola, Oscoda, Otsego, Ottawa, Presque Isle, Roscommon, Saginaw, Schoolcraft, Shiawassee, St. Joseph, Tuscola, Van Buren, Washtenaw, Wayne, Wexford.

Notes. Social parasite of B. impatiens, B. bimaculatus and B. vagans .