Osmia (Melanosmia) aff. trevoris Cockerell 1897

Gibbs, Jason, Ascher, John S., Rightmyer, Molly G. & Isaacs, Rufus, 2017, The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history, Zootaxa 4352 (1), pp. 1-160 : 119

Osmia (Melanosmia) aff. trevoris Cockerell 1897

County records: Alger, Allegan, Chippewa, Kalkaska, Keweenaw, Marquette, Missaukee, Montcalm, Montmorency, Oscoda, Schoolcraft.

Notes. Females of O. aff. trevoris can be recognized by the following combination of characters: clypeal margin with small triangular notch medially, clypeal setae brown, mandibular carinae parallel and scopa dark brown (M. Arduser, unpublished data). Males would run to couplet 27 in Mitchell (1962), being similar to both O. collinsiae Robertson and especially O. subarctica (see above). The species was compared to O. inurbana Cresson and O. trevoris by MGR, likely synonymous names based on male and female types, and widely collected in western North America. Material from Michigan, Indiana, and Ohio need further study to resolve the taxonomic status of these specimens.

Material examined. Kalkaska Co.: (no locality), 1 Jun. 1966, ex. window pane trap, L.F. Wilson (2 ♀ MSUC) ; Montcalm Co.: Flat River Game Area , 14 May 1955, R.L. Fischer (1 ♀ MSUC) ; Montmorency Co.: (no locality), 5 Jul. 1966 ex. window pane trap, P.C. Kennedy (2 ♀ MSUC) ; (no locality), 18 Jul. 1966 ex. window pane trap (1 ♀ MSUC); Oscoda Co.: (no locality), 14 Jun. 1966 ex. window pane trap, L.F. Wilson (3 ♀ MSUC) .