J.P. Alcorn 1938 (19) Thomomys bottae canus Feb.24 1938 13 mi W Fallon, 4000 ft. Churchill County, Nevada Total Tail H.Foot Sex Ovaries 10 1/6 2 13/6 1 5/6 ♂ 9 9/6 3 1/6 1 1/6 ♀ No embryo 8 1/6 2 1/6 ♂ 1 1/6 ♂ 10 7/6 2 7/6 1 4/6 ♂ 10 1/6 3 1 1/6 ♂ 8 5/6 2 7/6 1 9/6 ♀ Milk in udder. Apparently had young. 10 3/6 2 1/6 1 1/6 ♂ Feb.25 1938 Seventeen pocket gophers were caught in traps on Swingle Bench. Eight were males nine females. Females as follows:- Embryo 7% developed were found in two. One had 6 embryo One had 5 embryos, the other 7 contained no embryo. March 1 1938 4 mi W Fallon, 4000 ft. Churchill County, Nevada. On March 1, 1938 a pocket gopher was dug out and turned loose in a clean field of alfalfa and in four weeks we dug this or rather tried to dig this gopher out. She had built a nest 40 inches under the ground. I turned her loose in the edge of an alfalfa field with a small hill near by. In four weeks she had 194 feet of tunnel system. Her nest had 28 pieces of alfalfa roots in the nest. 37 alfalfa roots had been cut completely off from four to eight inches below the crown of the alfalfa plant. 2/3 of the tunnels were