CROTAPHYTUS 107 



sometimes bears large brown spots. The head is irregularly 

 spotted and reticulated laterally and inferiorly. The throat 

 .'.nd belly are white more or less suffused with blue; the 

 latter sometimes with large brown lateral blotches. 



Dr. Stejneger has given the following description of 

 the fresh colors of a young individual obtained near the 

 1-ittle Colorado River, Arizona. 



"Head above pale sepia, inclining to clay color; anterior 

 portion of upper neck in front of the first black collar pale 

 blue, with several longitudinal marks of 'coral red;' space 

 between the two black collars pale 'oil green', with a nar- 

 row transverse collar of coral red; ground color of black 

 dull oil green, fading posteriorly on hind legs and tail to 

 grayish 'pea green', the back densely covered with rather 

 large dark grayish olive blotches, which only allow the 

 ground color to show through as a fine reticulation; the 

 second black collar bordered posteriorly with a wide line of 

 'lemon yellow', the back being crossed by five similar lines, 

 fading posteriorly and more or less alternating on the lat- 

 eral halves of the body; tail with transverse bars of dark 

 grayish brown; fore legs above 'apple green', nearly yellow 

 on hand and faintly barred with the latter color; under sur- 

 face pale greenish-white, palms slightly pinkish, tail nearly 

 white. Tongue deep pink; pharynx blackish carmine; 

 palate ultramarine blue. Iris brassy greenish-yellow.' 



?j 



Length to anus. 60 82 90 99 100 106 



Length of tail 111 173 175 242 210 229 



Snout to orbit 5 8 9 9 10 12 



Snout to ear 16 23 25 30 29 32 



Width of head 14 20 23 25 25 26 



Fore limb ._.... 27 39 42 50 48 55 



Hind limb 54 82 82 98 90 103 



Base of fifth to end of 



fourth toe _. 20 29 29 33 31 37 



