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 Macropis ( Macropis ) nuda ( Provancher 1882 ) County records: Allegan, Alpena, Arenac, Berrien, Cheboygan, Dickinson, Gladwin, Hillsdale, Huron, Ingham, Iosco, Isabella, Lapeer, Mackinac, Midland, Newaygo, Osceola, Otsego, Saginaw, Van Buren. Notes. To our knowledge, only a single male of this oil-collecting bee has been collected in Michigan since 1959, although recent collections have been made locally in other states ( Wagner & Ascher 2008 ) and in eastern Canadian provinces ( Sheffield et al. 2004 ; Wagner & Ascher 2008 ). The bee has been collected historically across the entire LP, and its host plant is present widely in the state ( Voss & Reznicek 2012 ). Macropis nuda was among the species in the northeast modeled to be in decline based on historical records ( Bartomeus et al. 2013a ). The possibility of a decline is supported by lack or extreme scarcity of this and other Macropis species in recent bee surveys made using bowl traps in portions of the mid-Atlantic region where it was once common such as the vicitiny of Washington , DC (S. Droege, pers. comm.). The lack of recent Michigan records of this species and of an associated cleptoparasite ( Epeoloides pilosulus , last collected in 1944; see entry above) may be due in part to insufficient collection effort focused on this species. Macropis specializes on Lysimachia ( Cane et al. 1983 ; Michez & Patiny 2005 ), a plant that grows in moist, often shaded ground ( Voss & Reznicek 2012 ). Localities with L . ciliata L. present, sometimes in abundance near extensive riparian zones, were visited by JG in Ingham, Clinton, and Benzie Counties, in some cases on numerous occasions, specifically to collect Macropis , but without success. Material examined. Allegan Co . : Allegan , 2 Jul. 1936 ( 1 ♀ MSUC ) ; Hillsdale Co. : Pittsford SGA, 41.866, - 84.522, 8 Jul. 2017 ( 1 ♂ TJWC ) ; Ingham Co . : East Lansing , 20 Jul. 1937 ( 1 ♀ MSUC ) ; Mackinac Co . : (no locality) 11 Aug. 1959 ( 1 ♂ MSUC ) ; Midland Co . : (no locality) 5 Jul. 1938 ( 1 ♀ 1 ♂ MSUC ) ; Osceola Co . : 3 Aug. 1940 (1 ♂ MSUC); Otsego Co . : 5 Jul. 1940 ( 1 ♂ MSUC ) ; Saginaw Co . : (no locality) 14 Jul. 1940 ( 1 ♀ MSUC ) .