Davis. 741. San Diego Co., Calif. Jan. 10. in some places, but due to recent rains, but passable. Drove into Borrego Desert (Borrego Valley) and camped in an abandoned shack at a point: 5 mi. NW Borrego P.O., 700', San Diego Co., Calif. Set out short line of traps after dark. Sign hard to see due to recent rains. Typical creosote bush - Fraxinea dumosa desert. Hard kit foxes at night. Jan. 11. Pan traps. 5 Dipso meriamii. Set traps in the rocks S. of camp at the base of the San Ysidro mts. Poor sign. Two wood rat nests. Typical Eucalia - rocky hills association. Scattered ocotillo and creosote brushes. The San Ysidro mts. are to the west of camp, the Santa Rosas to the north, and the Vallecitos to the south. Jan. 12. Pan traps. 2 Peromyscus, 1 Perognathus. In P.M. set traps in mesquite 1/2 mi. NW Borrego P.O. Night of Jan. 11. saw Calvert, supervisor of Borrego Desert State Park, a short distance W. of camp. He is very intelligent, very cooperative and knows the country thoroughly. Jan. 13. Pan traps in mesquite. 2 Peromyscus, 1 Perognathus, 7 Dipso meriamii. Skinned A.M. Set more traps in mesquite and creosote flats about mesquite in P.M. Jan. 14. Pan traps A.M. 9 Dipso meriamii, 4 Perognathus penicillatus, 1 Peromyscus maniculatus. Skinned A.M. and part of P.M. Locked up at night preparatory (12).