Paris 13 46 2 mi. N Victorville, 2900', San Bernardino, Calif. May 5, 1946 which we are camped. The other B. californicus were taken at varying distances from camp on the soft sandy flats adjacent to the river. Bob took the truck out on the road to Sanstow looking for reptiles, as the air temperature at 8:30 P.M. was 77° F. He had no luck. May 6, 1946. After we packed the truck in a.m. went a few hundred yards from camp into some granitic outcroppings to hunt for chuckwallas. We saw none, although many lizards were sunning themselves on the rocks, including Uta stansburiana, Sceloporus magister, Sceloporus occidentalis, Callisaurus draconoides, and Cnemidophorus tesselatus. Noted white-throated swifits flying overhead. Drove on to a point 1/2 mi. S.E. Victorville, 2950', San Bernardino, Calif., where Bob spotted a Sauromalus obesus lying out of a large rock by the side of the highway. When Bob went after him, the chuck scrambled into a crevice in the rock, but only a few inches down. I climbed up on the rock and we placed flat rocks over most of the crevice wherein the chuck lay, leaving only a nar