1 86 VERTEBRATE ANIMALS OF THE UNITED STATES 



a2 Scales on the back enlarged, sharply distinct from the smaller 

 lateral scales (Fig. 104). 

 bi Tail very long, more than twice the length of the head and 

 body; usually without a median dorsal row of small 



scales U. graciosa. 



hi Tail shorter; i or 2 rows of small scales on the middorsal 

 line, between the rows of enlarged scales. 



Ci Lateral caudal scales small and smooth U. Levis. 



C2 Lateral caudal scales larger and more sharply keeled U. ornata. 



U. mearnsi Stejneger. Size large; length 230 mm.; tail 150 mm.: 

 western border of the Colorado desert, in rocky situations. 



U. stansburiana B. & G. (Fig. 103). Length 120 mm.; tail 60 mm.; 

 color dark green or gray, with rows of small light and dark blotches on 



Fig. 103. — Femoral pores on hind leg and scales of back of Uia stansburiana: i, femoral 



pores (from Cope). 



the back which are surrounded by scattered bluish dots: western Texas 

 to California; northward into Utah, Idaho and Oregon; very common in 

 deserts. 



Subspecies of U. stansburiana 



U. s. stansburiana B. and G. In northerly portion of range. 

 U. s. stejnegeri Schmidt. In the central portion of the range. 



U. s. hesperis Richardson. In the western portion of 

 the range. 



U. graciosa (Hallowell). Length 200 mm.; tail 140 

 Pj^ mm.; color gray or reddish, with a series of dark, wavy 



Scales of back cross bars on each side: southern California, Arizona and 



of Uta ornata -^t ^ ^• • n , i i 1 



{from Cope). Nevada; lives m small trees and bushes. 



U. levis Stejneger. Six middorsal rows of enlarged 

 scales; color uniform pale with markings: New Mexico, canyons south- 

 eastern Utah and western Colorado. 



U. ornata B. and G. (Fig. 104). Length 150 mm.; color gray, with 

 wavy black cross bands: western Texas to southern California; north- 

 ward into Utah. 



