350 3. IGUANID& 



Some specimens have some scales of these regions marked 

 with bright red or reddish orange. There is no longitudinal 

 light streak along the middle of the back, and no evident 

 dorsolateral longitudinal light band, except rarely on the 

 neck. The sides of the body are bluish with more or less 

 parallel narrow dark lines running in the direction of the 

 keels of the lateral scales. These lines are formed by from 

 one to three dark brown or blackish lines on each scale. The 

 central area of each lateral scale is bluish, yellowish, or 

 occasionally orange or bright red. The top of the head is 

 yellowish olive, usually without markings. There is a large 

 black blotch or collar in front of the shoulder, edged be- 

 hind, and sometimes in front, with pale blue or greenish 

 yellow. There is a similar but smaller black blotch on the 

 anterior and ventral surfaces of the thigh and side of the 

 body. These two black blotches may be connected by a 

 black streak along the belly just external to the median 

 longitudinal stripe of yellowish white. This black ventral 

 area is more or less tinted with, replaced by, or externally 

 edged with, intense blue. The chest may be yellowish white, 

 or more or less clouded with blue or black. The central 

 gular region is blackish indigo, usually with many of its 

 scales having lighter blue centers which often form parallel 

 longitudinal blue lines separated by blackish ones. The upper 

 surfaces of the limbs are yellowish brown or olive, usually 

 with longitudinal dark and light streaks. The tail is in- 

 definitely cross-barred above with brown on a yellowish 

 ground. 



Females and some young males are much less brightly 

 colored, have more evident dorsal dark spots and lack the 

 narrow, parallel, dark lateral lines. 



