County records: Lake, Livingston, Manistee, St. Clair, Van Buren, Washtenaw, Wexford.
Notes. Scott et al. (2011) noted that type material of this species from Colorado and Illinois may not be conspecific and could not confirm presence in Colorado of material matching N. lepida from the eastern United States as described by Mitchell (1962) and identified by that author. They therefore removed this species from the fully confirmed Colorado state list. However, the male lectotype in the ANSP designated by Cresson (1916) was collected in Pike’s Peak, Colorado, making that occurrence correct by definition. The type series of lepida may prove to have been composite, and this would explain failure by Scott et al. (2011) to confirm non-type lepida from Colorado that match this species sensu Mitchell (1962) and as identified by subsequent bee specialists working on the eastern fauna. If lepida sensu Mitchell (1962) do diverge from the Colorado lectotype, then populations from the eastern United States, including Michigan, may require description as a new species unless another name is found to be applicable.