12. SCELOPORUS 311 



In Idaho, this lizard has been taken in Jerome (Sage 

 brush plains between Shoshone and Blue Lakes, Blue Lakes 

 Canyon, Blue Lakes, between Blue Lakes and Shoshone 

 i^'alls, on canyon walls at Shoshone Falls north of ferry), 

 and Ada (Boise), counties. 



Utah records are from Salt Lake (Salt Lake City), Mil- 

 lard (four miles north of Cove Fort, seven miles south of 

 Kanosh, Dome Canyon), Beaver (Beaver), and Washington 

 (Diamond Valley, ten miles west from St. George), 

 counties. 



In Lower California, it is known to occur in the northern 

 part of the peninsula at Tijuana, Hanson's Lagoon, San An- 

 tonio, Ensenada, San Tomas, Decarte, Valladeres, San Pe- 

 dro Martir Mountain, Trinidad, Santa Rosa, San Jose, Rosa- 

 rito Divide, and San Ysidro Ranch and Nachoguero Valley 

 near the United States border. 



Habits. — Like its northern congener — S. o. occide-ntal'n 

 — and its larger relative of the desert — S. magtster — the 

 Fence Lizard frequently performs a curious exercise while 

 watching an intruder and determining whether he be friend 

 or toe. Clinging to the rough bark of a tree or the lichen- 

 painted surface of some old fence, it rapidly raises and low- 

 ers its head and body, often attracting attention to itself 

 where the harmony of coloring would prevent its being 

 noticed if motionless. It rarely is seen in open fields, pre- 

 ferring wooded districts or areas where rocks abound. 



Dr. and Mrs. Grinnell, whose observations were made 

 near Los Angeles, write "The fence lizard, altho outnum- 

 bered even in its own particular habitat by the brown- 

 shouldered, is probably the most easily noticed of all our 

 lizards. It is to be seen on prominent boulders, trunks and 

 limbs of trees, fences, old buildings out in the country, and 

 flumes. The fence lizard abounds in our mountain canyons; 



