B.R. MOON 1987 Species Account Chuckwalla (Sauromalus obesus) 21 May Hole in the Wall campground, Providence Mountains, San Bernardino co., CA. T 11N R 15E Sec 8 sw'1/4. elev. ~1300m. Adult lizard seen on rock near picnic table in campground. It ran across the ground + up into a crevice in the volcanic rock. Habitat is desert scrub, including some junipers and great Basin sagebrush, but no creosote. Sunny day, breezy, mild. This chuckwalla had a reddish torso, black at both ends, and greyish tail. 21 May Wild Horse Canyon, west side of Hole in the Wall, Providence Mountains, San Bernardino co., CA. T 11N R 15E Sec 7 se'1/4. elev. 1300 m. Harry Greene caught a juvenile chuckwalla near the base of the butte on the west side of Hole in the Wall (in Wild Horse Canyon). The lizard was on brownish volcanic rock; desert scrub vegetation (Yuccas, cholla, & other small shrubs) Specimen collected by Harry Greene.