188 3. IGUANID.^ 



the neck. The chin and gular regions, except a large central 

 patch of greenish olive (orange in life), (pale turquoise 

 blue in some specimens), are Indian yellow, which color is 

 continued over the sides, and faintly over the back of the 

 neck, just in front of the first black dorsal band. The eye- 

 lids and a small area surrounding the pineal "eye" are also 

 yellow. The hind limbs are pale sepia, with indications of 

 seven faint yellowish crossbars. The upper surface of the 

 tail is bluish, greenish, and brownish, crossed by 21 broad 

 dark olive or greenish olive bars. The lower surfaces of 

 the tail, limbs, abdomen, and chest, are creamy white, tinged 

 on the chest with olive-green and Indian yellow. (In very 

 young individuals there are three transverse greenish bars 

 on a yellow ground.) In the pouches at each end of the 

 middle gular fold are patches of flame scarlet, but close 

 examination shows that this color is due to the presence of 

 multitudes of minute parasites. 



Length to anus 52 95 103 130 15 + 



Length of t?.il„.. 110 ...... ...... 248 



Snout to ear 14 19 20 32 36 



Snout to fold 33 35 



Shielded part of head 19 20 



Width of head..-.- 11 15 18 28 30 



Shielded part of head 19 20 .-... 



Fore limb 26 41 42 63 67 



Hind limb 38 63 69 90 95 



Base of fifth to end of fourth toe .... 25 27 



Distribution. — This beautiful lizard has been known 

 only from the San Lucan Fauna of southern Lower Cali- 

 fornia. It was originally described from specimens col- 

 lected by Mr. Xantus at Cape San Lucas. Mr. Belding 

 found it at Playitas, San Lazaro, and in the Victoria 

 Mountains, not at La Paz. I have examined specimens 

 from San Jose del Cabo, San Bartolome, Corral de Piedras, 



