12. SCELOPORUS 349 



slightly imbricate; interparietal largest. Frontal divided 

 transversely. Parietal and (usually) frontoparietal plates 

 not separated from large supraoculars. Latter very broad. 

 Superciliaries strongly imbricate. Middle subocular very 

 long, narrow, and strongly keeled. Rostral plate wider than 

 high. Labials long but very low, inferior a little larger 

 than superior. Symphyseal large, followed by several 

 plates larger than gulars and separated from lower labials 

 by from one to three rows of narrow sublabials. Gular 

 region with scales smooth, flat, bicuspid, and strongly im- 

 bricate, as are also scales on belly. Ear-opening large, 

 nearly vertical, and protected by a series of very long, acumi- 

 nate scales. Dorsal scales large, equal in size or larger cen- 

 trally, smooth or rather weakly keeled near their bases, but 

 strongly keeled and pointed distally, arranged in nearly par- 

 allel longitudinal rows. Scales of sides pointed obliquely 

 upward, and changing gradually from carinate dorsals to 

 smaller smooth ventrals. No longitudinal dermal folds. 

 L^pper surfaces of limbs provided with strongly keeled and 

 pointed scales. Scales on posterior surface of thigh large, 

 acuminate, strongly keeled and pointed. Upper caudal 

 scales similar to dorsals, but having longer points. Femoral 

 pores varying in number from 16 to 22 on each thigh; 

 average in 98 thighs, 18.54. Five or six dorsal scales in 

 adults equaling length of shielded part of head. Number 

 cf scales in a row from interparietal plate to a line connect- 

 ing posterior surfaces of thighs varying from 26 to 32; 

 average in 53 specimens, 29. Males with erdarged postanal 

 plates. 



The color above, in adult males, is yellowish brown, be- 

 coming yellower on the hind limbs and base of the tail. 

 Many of the scales on the back are marked with greenish 

 blue in varying amount. The scales on the base of the tail 

 and on the hind limbs often are spotted with bright yellow. 



