Epeoloides pilosulus (Cresson 1878)

County records: Berrien, Midland, Van Buren, Wayne.

Notes. This is a cleptoparasite of multiple Macropis species likely including M. nuda (Cockerell) (Sheffield et al. 2004) and M. ciliata Patton (Wagner & Ascher 2008), which in turn are specialists on Lysimachia ( Myrsinaceae, formerly Primulaceae) (Cane et al. 1983). Observations were lacking from its entire range for many decades (Michener 2000), but it has been rediscovered very locally in Canada (Sheffield et al. 2004) and in the United States in New England (Wagner & Ascher 2008) and New York (http://bugguide.net/node/view/954741). Of the four specimens examined from Michigan, none was collected in the last 70 years.

Material examined. Berrien Co.: Paw Paw Lake, 9 Jul. 1906, E. Liljeblad (1 ♂ UMMZ) ; Midland Co.: (no locality), 23 Jul. 1928, R.R. Dreisbach (1 ♀ MSUC); (no locality), 24 Jun. 1944, R.R. Dreisbach (1 ♂ MSUC); Wayne Co.: Detroit, 18 Jul. 1937, G. Steyskal (1 ♀ MSUC) .