A new pocket gopher of the thomomys quadratus group from the Northern Great Basin Region

Critical examination of specimens of Thomomys quadratus from Utah has brought to light the existence of an hitherto unnamed race from the Raft River region in the northwest corner of the state and contiguous areas of Idaho and Nevada. Extensive material from northeastern Nevada in the collection of Ralph Ellis, of Berkeley, California, has been graciously made available, as well as other specimens from Utah through the courtesy of J. S. Stanford of the Utah State Agricultural College at Logan, Utah.