Mayhew 1959 June 12 Journal 64. 1000 Palms area, Riverside Co., Calif. Dune; collected our soil samples, then began looking for lizards. There were a large number of snake tracks over the sand. They appeared to have been made by relatively small snakes. I haven't seen so many snake tracks at one time before. We collected reptiles from 0630 to 1010 when it appeared all the lizards on the dunes were through being active for the day. For example, at 0925 the water in one of our canteens was 42.2°C. (108°F.), and by 1000 it was 44.5°C. (112°F.). The air temp. (30°) when we stopped at 1010 was 40.8°C. (105°F.). As we headed for home (near the power line road inter- section with the old highway) we saw a total of 6 Dipsosaurus dorsalis cross or come to a stop on the pavement. We stopped and captured 5 before they all disappeared. Including these animals and the 1 we caught last night, we captured the following in this area: Dipsosaurus dorsalis - 7 (sexes not determined) Colonyx variegatus - 1 (ad. ♀) Phrynosoma platyhinus - 1 (ad. ♂) Urosaurus graciosa - 1 (ad. ♂) Uma inornata - 24 (3 ad. ♂, 11 ad. ♀, 5 imm. ♂, 5 imm. ♀) This gave us a total of 34 caught in this area, and 113 for the entire trip, making this one of the most successful