Megachile (Megachile) relativa Cresson 1878

County records: Alcona, Alger, Alpena, Antrim, Baraga, Barry, Benzie, Cheboygan, Crawford, Delta, Dickinson, Emmet, Gogebic, Ingham, Iosco, Iron, Jackson, Kalamazoo, Kent, Keweenaw, Leelanau, Luce, Mackinac, Manistee, Marquette, Mecosta, Menominee, Midland, Montmorency, Oakland, Ogemaw, Ontonagon, Osceola, Otsego, Ottawa, Presque Isle, Roscommon, Saginaw, Schoolcraft, Wexford.

Notes. Stem-nesting described from Ontario (Fye 1965) and Wisconsin (Medler & Koerber 1958; Medler & Lussenhop 1968).