Mayhew 1960 Journal Mar. 14 Riverside area, Riverside Co., Calif. We started looking a short distance east of Moreno. The 1st Sceloporus orcutti was seen on a rock in the sun at 1010. They may have been active earlier, but we didn't reach their habitat until then. At that time, air temp.(30") was 19.0°C., rock surface temp,(sun) was 31.0°C. Numerous Sceloporus orcutti were seen from then until 1415. By that time temps. had cooled sufficiently to cause these animals to retreat to their underground (or underrock) locations for the rest of the day. Sceloporus occidentalis were seen only from 1245 to about 1400. It may have been that we weren't in good Sceloporus occidentalis territory the rest of the time. Animals caught today: Uta stansburiana - 2 (1ad ?; 1ad ?) Sceloporus occidentalis -3(ad. ?) Sceloporus orcutti - 6(3ad. ?; 1ad.?; 2 im.?) Total - 11 We found some excellent looking area for these two species of Sceloporus N.W. of Perris. (Turn off Highway 395 at Markham St.- just S. of March Air Force Base). Hills are low, but quite rocky. We returned to UCR at 1615 after a trip of 75 miles today. We were in #310, a Nash Rambler Sedan. 15.