REPTILES 



199 



to the Pacific, from New Jersey, Michigan and Oregon southward; 

 common; in dry, sandy places, especially in pinelands; tail very brittle. 



S. clarki Baird & Girard. Length 220 mm. ; tail 120 mm. ; color gray 

 or brown, with dark transverse bands; a green spot in each scale on the 

 back; broad black collar interrupted above: New 

 Mexico, Arizona and Mexico; common. 



S. consohriniis B. & G. Similar to S. undulatus, 

 but with 2 pale lateral stripes instead of cross bars 

 and smooth head scales: Dakota to Texas and west- 

 ward to California; common. 



S. spinosus Wiegmann. Similar to S. undulatus, 

 but 250 mm. long, with coarsely bristling scales, with 

 a, broad, pale band on each side and an oblong black 

 patch on each shoulder: Florida to New Mexico and 

 Mexico. 



S. graciosus B. & G. Color brown or olive, with 2 

 yellow stripes on each side enclosing a dark band and a round black 

 spot in front of each fore leg: Great Basin region, from Oregon and 

 Idaho to Nevada and southern California; common. 



Fig. 105. — Head of 

 Sceloporus occidentalis 

 {from Cope). 



Fig. 106. — Sceloporus undulatus {from Fowler). 



S. torquatiis poinsetti B. & G. Length 250 mm.; tail no mm.; body 

 stout; tail short and blunt; scales very coarse and pointed; color dull 

 olive with a broad, black collar bordered with yellow: Texas to Arizona 

 and Mexico. 



S.jarrovi Cope. Length 177 mm.; tail 80 mm.; color bluish black, 

 with a light spot on each scale and a broad black spot on each side of the 

 neck: southern Arizona. 



