Peterson 1935. July 23. Catch consisted of 4 Peromyscus m. sonoriensis, 4 Microtus mordax and 2 Zapus). Skins prepared of all animals caught. 75 traps set along creek bank and canyon slope. Out to hunt rabbits, etc. Nothing seen. July 24. 6 mi. SW Mountain City, Cobb Creek, 6550 ft., ELKO Co., Nevada. Catch consisted of one Sorex palustris navigator, one Thomomys quadriatus, one Eutamias sp?, one Eutamias m. scrutator, one Callospermophilus lateralis, 9 Zapus, 5 Perognathus p. olivaceus, and 4 Peromyscus m. sonoriensis & 4 Microtus mordax. Hike along ridge of divide between Cobb Creek and Chicken Creek to peak overlooking valley of Silver Creek. Deer tracks seen, young blue bird and sage thrasher shot. Cattle throat ridge, slopes, canyon bottom of Cobb Creek. Couple Eutamias sp? heard on descent thru canyon of Cobb Creek to camp at 6550 ft. One Eutamias sp? shot on descent near camp. Skins prepared of Sorex p. navigator, Eutamias sp?, Eutamias m. scrutator, 2 Zapus, Thomomys quadriatus, Callospermophilus lateralis and 5 Perognathus p. olivaceus. Traps left out: 2 Eutamias m. scrutator caught.