Great Basin Naturalist


New species descriptions of Negastrius rupicola from California, Oregon, Washington, and British Columbia; N. stibicki from California, Montana, and British Columbia; N. solox from Arizona and New Mexico; and N. atrosus from Ontario and Quebec are given. Negastrius colon is returned to species status, and a neotype is designated for N. choris. Fleutiauxellus extricatus is a new combination. A key is provided to Neararctic species of Negastrius.