Mayhew 1958 Oct. 10 Barton Flats area, San Bernardino Co., Calif. Journal 107. at this location at 1330 was 23°C. We retraced our route to the Jenkins Lake turnoff, went to look at Jenkins Lake, then drove the 4 miles from the paved road to Jenkins Lake to the parking area at the edge of San Gorgonio Wilderness Area. We looked for lizards here, but saw only one juvenile Sceloporus graciosus running about, even though the air temp. was 19°C. (66°F.) under perfectly clear skies (at 1530). At this time the wind velocity was 4 mph. from the N.W., relative humidity was 29%. The altitude is 7650 feet. We returned to Riverside from here, leaving at 1535 and reaching UCR at 1650. The entire trip covered 110 miles. The weather seemed ideal to us, and we were in good lizard country at the right time of day as far as we know. Nevertheless, few lizards were to be seen. Since S. occidentalis is found at lower altitudes generally than S. graciosus, one would believe that S. graciosus would be more tolerant of lower temps. than S. occidentalis. How- ever, we saw only adult S. occidentalis, even above 6000 feet.