Mayhew 1959 Apr. 24 Mojave Desert, San Bernardino Co., Calif. 5 adult ?, 5 adult ♀, 4 immature ?; Dipsocamum dorsalis - 2 adults and 4 immatures (sexes unknown). We returned to the car at 1225. At this time, the air temp. (30") was 32.6°C., air temp.(1m) was 37.5°C., & soil surface temp. was 49.0°C. The relative humidity was 14%. We drove through 29 Palms to the Old Woman Springs Road near Yucca Valley. We caught 1 Sceloporus occidentalis, 1 Sceloporus magister, & 1 Uta stansburiana here. Then we drove through Joshua Tree Natl. Monument (in which we had a flat tire), through Box Canyon in the Meecca Hills to Meecca. Here we bought some food that we could eat while driving. (White gas is available at the Chevron station in Meecca.) We drove down the east side of the Salton Sea to Brawly, arriving there at 1945. We night collected from the eastern edge of Brawley to the Gilby-Palo Verde Road & back to our campsite in the algodones Dunes. On this trip we collected 14 Coleonyx variegatus (9 ♂ and 5 ♀) and released an additional ?. We parked on top of the big dune at 2230. The minimum temp. tonight was 65°F. We saw 2 Crotalus cerastes recently hit by cars.