316 3. IGUAN1D& 



irregular whorls of strongly keeled and pointed scales, 

 larger and rougher above than below. Femoral pores vary- 

 ing in number from 14 to 19 on each thigh ; average, 16.52. 

 Eight to 1 1 dorsal scales equaling length of shielded part 

 of head. Number of scales in a row from the interparietal 

 plate to a line connecting posterior surfaces of thighs vary- 

 ing from 43 to 51 5 average, 47.5. Males with enlarged 

 postanal plates. 



The back is brown, olive, or greenish gray, marked with 

 large blotches or undulate cross-bands of dark brown, and 

 more or less dotted, spotted or blotched with green, pale 

 blue or yellowish gray. A light dorso-lateral stripe may be 

 more or less evident. The sides are brown like the back and 

 similarly marbled. The head is brown or olive above with 

 narrow lines or dots of dark brown, which are most distinct 

 between the eyes and on the temples. The tail is olive or 

 brown, sometimes with irregular dark brown rings. The 

 lower surfaces are everywhere suffused with blue in brightly 

 colored specimens. In others, the central belly, chest, limbs 

 and tail are yellowish white, often suffused with slate or 

 dull black. The most intense blue is on the gular region 

 and on each side of the belly, often shading to blackish blue 

 along the middle of the belly and across the chest. Males 

 have the entire throat deep blue, in a single patch, and 

 females are similarly but less intensely colored. 



Mr. Camp described the coloration as follows: "Belly 

 alizarine blue (of Ridgway, 1912), in darkest males, to 

 clear cadet blue in the lightest females; throat diva blue 

 to light cadet blue; chest only slightly dusky in the darkest 

 specimens; males with hind limbs beneath and anterior 

 border of anus, greenish blue, nearly as dark as belly. Back 

 very dark as in darkest bi,-seriatus\ sides and some scales 

 on back greenish; lighter and darker crescentic markings 



