Stelis (Stelis) subemarginata Cresson 1878 ( subemarginata group) (New state record)

(Fig. 17B)

County records: Keweenaw.

Notes. A single specimen record confirmed by S. Droege and examination of photographs. Fye (1965) recorded this species from Black Sturgeon Lake, Ontario; approximately 125 km north of Isle Royale as a cleptoparasite of Hoplitis spoliata (see also Sheffield et al. 2008). Graenicher (1935) recorded it from a nest of Osmia simillima Smith from Milwaukee, Wisconsin on the shore of Lake Michigan, but his identification might apply to Stelis labiata (Medler & Lussenhop 1968) .

Recorded as a cleptoparasite of H. spoliata and O. simillima .

Material examined (photograph). Keweenaw Co.: Isle Royale National Park, 48.1252 -88.5111, 14 Jul. 2013, S. Wilson (1 ♀ PWRC).