270 3. IGUANID^ 



throat. Superior surfaces of limbs provided with strongly 

 keeled scales. Posterior surface of thigh covered with small, 

 smooth scales. Ventrals smooth, often biscuspid. Caudal 

 scales proximally larger than dorsals, strongly keeled and 

 pointed. Femoral pores varying in number from 13 to 17 

 on each side; average, 14.3; the series nearly meeting in 

 preanal region. About eight to 1 1 dorsal scales equaling 

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

 from interparietal plate to a line connecting posterior sur- 

 faces of thighs varying from 39 to 4-2; average in five 

 specimens, 40.8. Males with enlarged postanal plates. 



The color above is light brown with two narrow light 

 longitudinal lines and two series of dark brown blotches on 

 each side. Along the middorsal line the ground color shows 

 as a longitudinal stripe one or two scales wide. External 

 to this stripe is a series of more or less undulate, crescentic 

 blackish brown spots or blotches. These dark spots 

 are separated from each other by the length of about one 

 or two scales. In width they extend over about two or 

 three scale rows, while in their shorter dimension they in- 

 volve about one and a half or two rows. The intervals 

 between them are light brown, a little darker than the mid- 

 dorsal band. Some of the scales of these crescentic blotches 

 have whitish tips. Immediately external to this series of 

 blotches is a narrow yellowish white line occupying less than 

 the full width of one longitudinal row of scales, these scales 

 being usually edged with blackish brown. About three rows 

 of scales separate this dorsolateral light line from a second, 

 or lateral, light line, similar but less definite, which origi- 

 nates at the top of the ear-opening. The space between 

 these two longitudinal lines carries a series of blackish 

 brown, crescentic blotches similar to the upper dorsal series 

 but smaller and less regular. The brown ground, relieved 

 with a few blackish brown dots, covers one or two rows of 



