82 CALIFORNIA ACADEMY OF SCIENCES. 



smooth, imbricate, and usually bicuspid. Tail with 

 irregular whorls of strongly keeled and pointed scales 

 much larger and rougher above than below. Femoral 

 pores varying in number from thirteen to eighteen on 

 each thigh. Seven to eleven dorsal scales equaling 

 length of shielded part of head. Number of scales in 

 a row from interparietal plate to a line connecting pos- 

 terior surfaces of thighs varying from thirty-five to 

 forty-four; average in thirty specimens, forty and two- 

 tenths. Males with enlarged postanal plates. 



The back is brown, olive, or grayish buff, marked 

 with large blotches or undulate cross-bands of dark 

 brown and more or less dotted, spotted, or blotched 

 with green or pale blue. The sides are similarly col- 

 ored. Above, the head is brown or olive with narrow 

 lines of dark brown, which are most distinct between 

 the eyes and on the temples. The tail is olive or brown 

 with irregular dark brown rings. All the lower sur- 

 faces are grayish or yellowish white, often suffused with 

 slate or dull black. Along each side of the belly is a 

 large patch of deep blue, usually bordered internally by 

 a black band of varying width. Males have one large 

 central throat-patch of deep blue, but females may have 

 two lateral patches. The posterior surfaces of the limbs 

 are yellow. 



Length to amis 41 45 68 72 77 78 



Length of tail 64 69 108 103 



Snout to ear 10 11 15 15 17 17 



Width of head 8 9 13 13 14 14 



Shielded part of head 9 11 14 14 15 15 



Fore limb 19 23 32 31 35 .35 



Hind limb 31 ,35 51 51 56 55 



Base of fifth to end of fourth toe 13 15 22 20 21 22 



Distribution. — The Fence Lizard, or Tree Swift as it 

 is sometimes called, occupies the coast region south of 



