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 Nomada autumnalis Mitchell 1962 ( ruficornis group) ( Michigan holotype ; Fig. 12B ) Nomada ( ?Heminomada ) autumnalis Mitchell, 1962: 382 . Holotype . USA : Michigan : Oakland Co. : 23 Sep. 1923 , A.W. Andrews ( NMNH : 75212). County records: Montmorency, Oakland. Notes. Species delimitation and identification of bees within the genus Nomada are notoriously challenging and the ruficornis group, which may be paraphyletic ( Alexander 1994 ) and includes the majority of eastern species ( Alexander & Schwarz 1994 ), is in need of revision. The taxonomy of this species, which is nominally endemic to Michigan , remains in doubt.