Peterson 1935. Onychomys leucogaster brevicaudus July 22. 5 mi. W Halleck, 5200 ft., Elko Co., Nevada. Skeleton prepared of one caught by Mr. Richardson, July 28. 18 mi. NE Iron Point, 4600 ft., Humboldt Co., Nevada. nine caught on gentle slopes of plateau bordered on one side by rock cliff consisting of some rocky but mostly gravelly soil covered with sage brush. Region notoriously plentiful with Onychomys attested not only by my relatively large catch but also by catch of rest of party. Onychomys l. brevicaudus a pretty mouse - it would win in a "Mus-cular" Beauty Contest.