Mayhew 1963 Journal 31. July 15 San Bernardino Mts., San Bernardino Co., Calif. Dave Renner, Shirley Hill & I left UCR at 0715 to collect a sample of Sceloporus graciosus from this range in July. We looked for lizards in the Barton Flats area from 0830 to 1300. During this period we caught 19 Sceloporus graciosus and 2 Sceloporus occidentalis. The S. graciosus were very wary today - much more so than I have usually seen them at this location. Several sub-adults were captured today, but no real immature lizards were seen. We returned to UCR at 1420 after a trip of 110 miles. July 16 San Jacinto Mts., Riverside Co., Calif. Dave Renner, Shirley Hill, Bobby Mayhew & I left UCR at 0720 to collect Sceloporus graciosus. We collected on and near our lots at Pine Cove. We collected between 0840 and 1215. During this period we caught 25 animals - 24 Sceloporus graciosus (11?, 13?) and 1 (?) Sceloporus occidentalis. These animals were as "spooky" as those we had chased in the San Bernardino Mts. the day before. Many were seen that we were unable to catch. We returned to UCR at 1330 after a trip of 103 miles.