A list of bees from three locations in the Northern Rockies Ecoregion (NRE) of western Montana Reese, Elizabeth G. Burkle, Laura A. Delphia, Casey M. Griswold, Terry Biodiversity Data Journal 2018 6 27161 27161 Cresson, 1864 Cresson 1864 Insecta Megachilidae Osmia CoL Animalia Osmia (Melanosmia) densa Hymenoptera 0 27161 Arthropoda species densa Melanosmia  Notes Collected from the Lewis and Clark County, Park County and Flathead County sites (Table 1, Suppl. material 1)