N. Stone 1941 july 24 6 mi NE Virginia City, 6000 ft., Storey Co., Nev. I set out 70 traps last night on sandy or rocky soil in Pinyon, Juniper, Sagebrush association. There are also a few Purshia bushes scattered about. I caught the following mammals: 1 Neotoma lepida, 18 5 Cutamias minimus, 38, 29 1 Dipodomys leucogenys, 18 3 Reithrodontomys megalotis, 18, 29 31 Peromyscus maniculatus, 188, 139 1 Peromyscus truei 18 Total = 42 traps = 70 % catch = 60 july 25 I set out 62 traps last night 2/3 of which were set in the middle of the road. In these traps I caught less than half my total catch of 20 Peromyscus maniculatus and one Dipodomys leucogenys. The other traps set yielded one Dipodomys leucogenys, 2 Perognathus parvus and the remaining Peromyscus maniculatus. The sex ratio was: Peromyscus maniculatus 118 98 Perognathus parvus Dipodomys leucogenys july 27 We left Middle Cr, 8000 ft., White Mt., Cornwaldale, Nev. We left the above camp the afternoon of the 25th, coming by way of Virginia City,