222 3. IGUANID^ 



scales, the largest exceeding in length diameter of largest 

 plate in front of ear. Back covered with scales or tubercles 

 of nearly uniform size becoming granular toward neck and 

 sides of body, scales of posterior part of back strongly or 

 weakly keeled, not imbricate, not mucronate, usually sep- 

 arated by minute granules. Scales largest on tail, strongly 

 keeled, shortly mucronate above and on sides, not imbricate. 

 Posterior surfaces of thighs and arms covered with small 

 granular scales similar to, but smaller than, those on sides 

 of body 5 other surfaces of limbs provided with keeled scales, 

 which are scarcely if at all imbricate. Femoral pores 1 5 to 

 19; average in 100 thighs, 16.26. Twenty-one to 25 larg- 

 est dorsals equal shielded part of head. About 106 to 116 

 scales in a row between interparietal and backs of thighs. 

 Fifth finger not reaching end of second; fifth toe not reach- 

 ing end of second; adpressed fore limb not reaching inser- 

 tion of thigh. 



The head is uniform olive brown or gray above. The 

 central portion of the neck, back and base of tail are uni- 

 form brown or bluish gray, rarely unicolor but usually with 

 thickly scattered dots of light blue on groups of from one 

 to five scales or granules. The sides are colored like the 

 back. The upper surfaces of the limbs and tail are light 

 brown or bluish gray, sometimes dotted with pale blue. The 

 gular region is blackish or grayish indigo. The other lower 

 surfaces are grayish or yellowish white, more or less suf- 

 fused with blackish or grayish indigo. There is a large post- 

 axillary blotch of blackish indigo. No specimens show dark 

 brown dorsal or lateral blotches. 



