Coelioxys (Cyrtocoelioxys) modestus Smith 1854

County records: Berrien, Ingham, Kalamazoo, Livingston, Menominee, Montmorency, St. Joseph, Washtenaw, Wayne.

Notes. Hosts include resin collecting species in the subgenus Megachile (Chelostomoides), including Megachile campanulae (Krombein 1967; O’Neill & O’Neill 2016). Records from leafcutting species, such as M. centuncularis (Graenicher 1927b), and M. relativa (Fye 1965), may be due to confusion with C. moestus (Krombein 1967) .