Mayhew 1963 Journal 32. July 18 San Gabriel Mts., Los Angeles Co., Calif. Dave Reuther, Shirley Hill & I left UCR at 0740 to obtain some Sceloporus graciosus. We looked for lizards from 0830 to 1200. During this period we captured 36 Sceloporus graciosus (11 ad m, 16 ad f, 9 immature or), (Four immature or were released), 5 Sceloporus occidentalis (2 ad m, 3 ad f), and 2 Uta stansburiana (1 ad m, 1 ad f), for a total of 43 lizards. We returned to UCR at 1340 after a trip of 106 miles. Aug. 11 Pine Cove, Riverside Co., Calif. I looked for Sceloporus graciosus on and near our lots from 0945 to 1200. During that period I captured 19 S. graciosus and 1 S. occidentalis. Only 14 S. graciosus were kept for the reproductive study (8 m, 6 f). The remaining 5 lizards (young) were measured and released. Aug. 13 Blue Ridge, Los Angeles Co., Calif. Shirley Hill, Dave Reuther & I left UCR at 0730 for a monthly sample of Sceloporus graciosus from this area. We collected here from 0830 to 1005. During this period we captured 25 lizards, as follows: Sceloporus graciosus - 19 " " occidentalis- 5 Uta stansburiana - 1