Chattin.g. 1940 Itinerary Dec 22 25 mi. 5 Needles, 475 ft., San Bernardino Co., Calif. mated included freshly cut creosote bush, fresh tips of cholla (some of which had been partially eaten) and seed pods of Acacia greggii. Rats were present in 6 out of about 8 or 9 mice torn apart and were easily caught. In some cases actual burrows were present beneath the pile of cholla spines and in some cases were 6 in (±) below the ground surface. p.m. Camp was broken and we travelled on down three Blythe to locality at 4 mi., 5 Palo Verde, 275 ft., Imperial Co., Calif. Here about 60 mouse traps and 8 rat traps were set out along edges and in bottom of Candy Dry Wash. Traps were set 8 to 1/8 yds apart and baited with walnut meats. Signs of Dipodomys merriami and D. deserti was fairly abundant. Vegetation of wash consists of Larrea divaricatum, Palo verde, Ironwood, and Mesquite, some of which is dead and forms “drifts” of sticks and dead limbs. Dec 23 a.m. Picked up traps which contained 13 D. merriami (caught mainly around & base of creosote bushes in bottom of wash), 2 D. deserti (caught at edge of wash