10. UTA 251 



from the eye back along the neck. The back and sides of 

 the body are brownish olive with numerous bright or green- 

 ish yellow scales scattered singly or in small groups. The 

 upper surfaces of the limbs are brownish or bluish with simi- 

 lar spots. The upper surface of the tail is light brown or 

 greenish or grayish olive, sometimes dotted with pale blue 

 near its base. The chin and gular region are washed with 

 light blue or indigo, with yellowish markings laterally and 

 on the labial plates. The lower surfaces of the body and 

 limbs are grayish, more or less suffused with indigo, which 

 may be very intense on the body, thighs and base of tail. 

 There is no definite postaxillary blotch of indigo, but an ill- 

 defined deep indigo suffusion in this area often is present. 

 The female is similar in coloration. 



Length to anus 44 47 47 52 54 54 



Length of tail 83 90 86 89 82 103 



Snout to ear 11 11*4 11J4 13 13 13 



Shielded part of head 10 J 11 11 12 12 12 



Width of head 9 9 9J4 1 1 11 11 



Fore limb 20 19 21 24 24 26 



Hind limb 34 35 35 40 38 43 



Base of fifth to end of 



fourth toe _ . 13% 14 14 15J/S 15 17 



Remarks. This species is a member of the U. stans- 

 buriana group but is easily distinguished by the size of its 

 dorsal scales and the absence of a definite blue blotch be- 

 hind the axilla. 



Distribution. Santa Catalina Island, Gulf of Califor- 

 nia, Mexico. 



