Kerndron 1950 Journal Sept. 13 | mi. W. 2 mi. S. Pinto Mts., 1750 ft., Riverside Co., Calif. Dr. Miller and I drove to a point near the large sand dune in Pinto Basin. This is situated on the N. side of the basin, about 1 mi. from the road at its nearest point. Arrived at top of dune at about 6:40 A.M. The temp. 6" above the sand at that time was 19.6°C.; the temp. of the surface sand was 17.3°C. The dune is an aeolian deposit of fine sand about 1/2 mile long, about 200 yds. wide at its widest point, and with a maximum height of 50 ft.+. Eastwardly it tapers to a wash running about N.-S (at that point); East of the wash is another, lower, smaller area of fine sand. The dune has scattered Creosote Bushes, and clumps of Eriogonum - as well as another low-bush (more thinly scattered). I set up the snake trap (100 ft. of 12" ht. window screen drift fence with a double core traps) on the N slope of the dune near the top. At about 8:00, saw and missed a young Utma. At about 8:30, shot an adult. Temp. of animal = 37.4°C.; temp. of sand in sun = 40.6°C.; temp. of sand in shade = 22.6°C.; temp. at 6" (in sun) = 28-29°C.