Megachile (Xanthosarus) frigida frigida Smith 1853

County records: Alger, Baraga, Charlevoix, Cheboygan, Delta, Dickinson, Emmet, Ingham, Iosco, Iron, Keweenaw, Lake, Mackinac, Manistee, Marquette, Mason, Midland, Washtenaw.

Notes. A nest in a poplar log was described from Manitoba (Stephen 1956). Graenicher (1905) records this species nesting in logs as M. addenda (Medler & Lussenhop 1968) .