Sains. 940. 1). Dec, 20. Judlow, 1712; San Bernardino Co., Calif. Arrived here 11:00 am. Truck broke, and repairs to take at least one day. This town is 30 mi. east of Barstow on U.S. 66. The desert starts from the immediate outskirts of the town. Sand and gravel with Larrea divaricata Fraseria dumosa and grasses are the dominant plants. One brush of Ephedra diplocate noted. Encelia frute common, interspersed between the creosote brush. There is a wide area of this type of coun- try stretching northeast to a jagged range of mountains (Bristol Mtns?) with their broad alluvial fans. There was a fair amount of sign about 250 yds. from the highway. Mostly Perognathus and Dipodomys. Very often clusters of holes were noticed at the base of the creosote brushes. Well-marked runways connected many of the holes, as far apart as 75'. The recent rains here have caused a packing of the soil with the result that runways, tracks, tail marks, and burrows are well marked and have not been obliterated by shifting sand. The temperature is fairly high during the middle of the day and most of the afternoon, and starts to cool off about 4:00. The sun set at about 5:30. Dec, 21. Caught 10 Dipodomys meriamii out of a total of 102 traps. They were caught in sets at the base of