Chattin, J. 1940 Itinerary dec 21 (cont) we continued trip travelling to locality 25 mi. S Needles, 475 ft, San Bernardino Co. Calif. Camp was set up shortly before dark and 80 mouse traps and 2 rat traps were set out. Trap line started in bottom of wash and then up side of small rocky hill to top where Neotoma droppings were present. Line the continued down hillside again into wash and back toward camp. Vegetation of region is mainly Larrea and Opuntia? 2 kinds with some scattered Ocotillo and Franseria dumosa. A few scattered Acacia greggii were found along the washes. Soil in bottom of wash was gravelly and hill sides were rocky. dec 22 - a.m. - Trap line was taken up. Catch included 1 Perognathus pericillatus (caught on rocky hillside) 1 Peromyscus and 1 Neotoma (both caught at top of hill among broken rocks) and 6 Dipodomys desertii (caught along bottom of wash among creosote and Cholla cactus bushes. After picking up trap-line Davis, Sibley and I tore up Neotoma nests or "houses" and caught 6 wood rats. These nests were all built at the bases of Cholla cactus or Acacia bushes and consisted of the branches of the cacti and such stored