Colletes aberrans Cockerell 1897 ( americanus group)

County records: Berrien, Ingham, Washtenaw.

Notes. A prairie associated species occurring widely in the Great Plains states, with the southern tier of Michigan counties appearing to be the eastern limit of its range.

Material examined. Berrien Co.: Warren Dunes State Park, 16 Jul. 1982, M. & A. O’Brien (1 ♀ UMMZ) ; Washtenaw Co.: Pinckney State Recreation Area, 11 Jul. 1981, M. & A. O’Brien (1 ♀ UMMZ) .

Additional material. Ingham Co.: East Lansing, 29 Jul. 1947, R. Fischer (SEMC).