REPTILES OF THE PACIFIC COAST. 83 



the range of Sceloporus occidentalis and both slopes of 

 the Sierra Nevada, together with portions of the San 

 Joaquin Valley and the desert ranges farther east. 

 How far north it lives on the western slope of the 

 Sierra Nevada and where it meets Sceloporus occidentalis, 

 we do not know. It doubtless occurs throughout the 

 whole length of the Great Basin, for it is common in 

 Idaho. Its vertical range in central California extends 

 up to about 8,000 feet. 



I have examined specimens from San Diego (San 

 Diego, Mexican border between Campo and the coast, 

 Cuyamaca Mts., Witch Creek, Santa Ysabel Valley 

 3,000-4,000 feet, Julian Mts.), Riverside (Cahuilla 

 Valley, Straxvberry Valley, Hernet Valley 5, 000 feet, Sail 

 Jacinto, Temescal, Riverside), Los Angeles (Alhambra, 

 Pasadena), San Bernardino (Mojave River near Victor, 

 Warren's Wells, Lytle Creek), Kern (Fort Tejon, Tejon 

 Pass, Walker Basin, Havilah, Kernville, Walker Pass), 

 Tulare (South Fork Kern River, Tulare, Visalia, Three 

 Rivers, East Fork Kaweah River 1,650-5,200 feet, Shot- 

 gun Canon, Kern River Lakes 7,000 feet), Fresno 

 (Fresno, Horse Corral Meadows, San Joaquin River 

 7,500), Mariposa (Nevada Falls Yoseinite Valley, Mari- 

 posa), and Inyo (Coso Mts., Argus Mts., near Owen's 

 Lake, Mt. Whitney, Independence Creek, White Mts., 

 Round Valley) Counties, California. 



It crosses Nevada (Charleston Mts., Mt. Magruder, 

 Juniper Mts., Grapevine Mts., Pyramid Lake) to Utah 

 and Idaho (along Snake River), and probably occurs in 

 eastern Oregon. 



Habits. Like its northern congener S. occidentalis 

 and its larger relative of the desert S. inagister the 

 Fence Lizard frequently performs a curious exercise 

 while watching an intruder and determining whether 



