12. SCELOPORUS 357 



lation of from four to six scales the upper of which are long 

 and acuminate. Dorsal scales rather large, strongly keeled, 

 vcty strongly mucronate, with serrate edges. Lateral scales 

 similar to, but smaller than, dorsals, arranged in oblique 

 series, graduating into dorsals and ventrals. Ventrals much 

 smaller than dorsals, smooth, strongly imbricate, bi- or 

 tricuspid. Caudals very strongly keeled and mucronate. 

 No longitudinal dermal folds and no transverse fold on 

 throat, but a strong fold on each side of neck is present. 

 Upper surfaces of limbs with large, keeled scales. Posterior 

 surface of thigh covered with large, keeled, mucronate scales. 

 Femoral pores varying in number from 13 to 18 on each 

 thigh J average in 95 thighs, 15.79. Six to 10 dorsal scales 

 equaling length of shielded part of head. Number of 

 scales in a row from interparietal plate to a line connecting 

 posterior surfaces of thighs varying from 32 to 39; average 

 in 25 specimens, 35.28. Males with enlarged postanal 

 plates. 



The back and sides are olive brown, many of the scales 

 having central markings of deep blue or green. A narrow 

 line of verdigris green runs along each side from the eye 

 to the base of the tail. Below this, a narrower similarly 

 colored line runs from the ear to a point a short distance 

 above and behind the axilla. A patch in front of the 

 shoulder, the central part of the belly, and the anterior and 

 lower surfaces of the thigh, are black, which color gradually 

 fades into the cyanine blue of the sides of the belly. The 

 throat is olive gray with greenish white lines which converge 

 to a point midway between the neck pouches. The tail is 

 brown suffused with campanula blue and beryl green to- 

 wards its base. 



There is very little variation in color, either individual, 

 sexual, or in accordance with age. One male from Mira- 

 flores has a single large blue patch on the throat through 



