360 3. IGUANIDM 



from .larj;e supraoculars. Latter very broad. Supercili- 

 aries strongly imbricate. Middle subocular very long, narrow 

 and strongly keeled. Rostral plate much broader than high. 

 Labials long but very low, inferior slightly larger than 

 superior. Symphyseal large, and followed by several plates 

 larger than gulars and, except first, separated from lower 

 labials by from one to three rows of narrow sublabials. 

 Gular region with scales smooth, flat, bi- or tricuspid, and 

 strongly imbricate. Ear-opening large, nearly vertical and 

 protected by a series of shortly acuminate scales. Back with 

 nearly parallel longitudinal rows of nearly equal-sized, 

 strongly keeled scales with strong points which protrude 

 beyond the serrate posterior margin. Scales of sides pointed 

 obliquely upward, and changing gradually from the larger 

 dorsals to smooth ventrals. No longitudinal dermal folds. 

 Upper surfaces of limbs provided with strongly keeled and 

 pointed scales. Scales on posterior surface of thigh large, 

 acuminate, keeled and pointed. Upper and lateral caudal 

 scales keeled, with very long points. Femoral pores vary- 

 ing in number from 11 to 15 on each thigh; average in 87 

 thighs being 12.34. Six or seven dorsal scales equaling 

 length of shielded part of head. Number of scales in a 

 row from the interparietal plate to a line connecting poster- 

 ior surfaces of thighs varying from 29 to 36; average in 50 

 specimens, 32.2. Males with enlarged postanal plates. 



The color above is brown, olive, or bluish gray, many 

 of the scales being marked irregularly with light blue or 

 green. Adult males usually have no definite dark markings 

 above on the head, neck, body and tail, but sometimes have 

 indefinite blotches of dark brown on the back of the body, 

 and faint dark cross-bars on the tail and limbs. These dark 

 markings are most persistent on the fore and hind feet. 

 Females and young show heavy dark brown blotches or un- 

 dulate cross-bars on the back of the body, and the limbs and 



