Coelioxys (Boreocoelioxys) moestus Cresson 1864

County records: Arenac, Calhoun, Cheboygan, Dickinson, Huron, Iron, Kalamazoo, Keweenaw, Marquette, Mecosta, Midland, Montcalm, Oscoda, Washtenaw.

Notes. Hosts include Megachile frigida Smith and M. texana Cresson (Pengelly 1955), M. centuncularis (L.) (Medler 1959; Sheffield et al. 2008), M. lapponica Thomson (Peck & Bolton 1946), M. relativa Cresson (Medler & Koerber 1958; Medler & Lussenhop 1968; Sheffield et al. 2008; Strickler & Scriber 1994), and possibly M. rotundata (Fab.) (Hobbs 1968) (see C. funerarius Smith entry below), M. melanophaea Smith (Pengelly 1955) and M. pusilla (Baker 1975) .