Nomada besseyi Swenk 1913 ( vincta group)

County records: Kalamazoo.

Notes. According to S. Droege, N. besseyi may be a junior synonym of N. graenicheri (Cockerell 1905b), a species known from relatively few specimens from Wisconsin and Ontario (Wolf & Ascher 2009) and recently reported from Minnesota (S. Droege, pers. comm.). Specimens from Michigan identified as N. besseyi in a revision (Broemeling & Moalif 1988) closely match images of the N. graenicheri holotype deposited at the NMNH. Broemeling & Moalif (1988) did not treat N. graenicheri in their revision of this group (as subgenus Pachynomada) and it was misplaced in the ruficornis species group by Alexander & Schwarz (1994). Members of this species group are cleptoparasites of Andrena (Callandrena s. l.) (Broemeling & Moalif 1988)

Material examined. Kalamazoo Co.: Gull Lake Biol. Sta. (KBS), 6 Aug. 1959, R.L. Fischer (1 ♀ 1 ♂ MSUC): Gull Lake Biol. Sta. (KBS) , 14 Aug.1965, R.L. Fischer (2 ♀ 1 ♂ MSUC).

Additional material. Kalamazoo Co.: Gull Lake Biol. Sta. (KBS), 27 Jul. 1963, G.C. Eickwort (BBSL): Gull Lake Biol. Sta. (KBS) , 12 Aug.1965, R.L. Fischer (BBSL).