Material examined. USA. Montana: 1 ♀ (INHS) Glacier National Park, Cut Bank Creek, 12.vii.1940, coll. H.H. & J.A. Ross. Colorado: 1 ♀ (INHS) Green Mt. Falls, 2.viii.1943, coll. H.H. Ross.
Distribution. Canada, USA (including Alaska, to California).