198 VERTEBRATE ANIMALS OF THE UNITED STATES 



U. levis Stejneger. Six middorsal rows of enlarged scales; color 

 uniform pale with markings : New Mexico ; canyons southeastern Utah 

 and western Colorado. 



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

 wavy black cross bands : western Texas to southern California ; 

 northward into Utah. 



Subspecies of U. ornata 



Fig. 104. — 



Scales of back JJ , o. omota B. & G. In Texas. 



of U la ornata -.j ,. •-r>-i x ^i a- 



{jrom Cope). ^- 0. Lineans Baird. In southern Arizona. 



U. 0. symmetrica Baird. In the Colorado desert. 

 9. Sceloporus Wiegmann. Spiny swifts. Small, active lizards with 

 large-keeled, sharply pointed and bristling scales; large supraocular 

 scales present; ear distinct; no neck fold: about 35 species, mostly in 

 desert regions of tropical America, several species, not here mentioned, 

 entering the United States from Mexico. 



Key to the more common United States Species of Sceloporus 



ai A single row of large supraocular scales, bordered on each 

 side by a single row of small scales. 

 bi Median row of small scales extending around forward 



two-thirds only of cresentic margin of supraocular. . .5. clarki. 

 scales, 

 bo Median row of small scales extending completely 



around cresentic margin 5. spinosus. 



ao A single row of large supraocular scales, bordered by a 

 single median and 2 ventral rows of small scales 

 (Fig. 105). 



bi A broad black collar on the sides of the neck 5. jarrovi. 



b2 No collar present. 



Ci In' the Great Basin and Pacific region S. occidentalis. 



C2 In the Great Plains region and west to CaUfornia. . .S. consobrinus. 



C3 In central and east-central Florida 5. woodi. 



as Supraocular plates similar to ao, but wrinkled and 



sometimes with 3 ventral rows of small scales S. undulatus. 



3n Two rows of supraocular scales, bordered above by i and 

 below by I or 2 rows of small scales. 



bi A broad, black collar round the neck 5. torquatus poinsetti. 



b2 No collar present S. graciosus. 



S. undulatus (Latreille). Pine lizard; fence Uzard; swift (Fig. 106). 

 Length 140 mm.; tail 70 mm.; scales large and rough; color grayish or 

 greenish, with a series of black, wavy cross bars on the back and a pale 

 band extending backward from the eye on each side: from the Atlantic 



