Kerleibson 1950 Sceloporus occidentalis Aug. 26 Lower Covington Plate, 5000 ft., Riverside Co., Calif. At water hole in canyon S. of camp (actually, canyon emptying into first wash S. of camp), while watching for birds, noted medium-sized individual running on rocks on S. wall of canyon, about 10 feet away. The rocks on which it was running was covered spottily with reddish lichen; soon after I began watching it, it moved about 6" in one dart and picked up something from the center of a patch of red lichen. Upon my moving a hand to my face to dislodge a fly, it whipped around facing me and froze for about 30 seconds, then bobbed rapidly 5 times. Presently it moved back to its original position, bobbed three times, then four again. After he appeared to be fully settled down again, I intentionally moved my hand upward about 6". He reacted instantly by changing position, and I am certain he saw the movement. For about 5 minutes thereafter it remained almost motionless, then I shot at a Pipistrellus flying overhead,