REPTILES OF THE PACIFIC COAST. 49 



imbricate. Eyelids bearing a well developed fringe. 

 Supralabials strongly imbricate and produced laterally 

 so as to form a series of curves when seen from above, 

 Infralabials small and juxtaposed. Below them, several 

 series of flat sublabial plates. Gulars granular and 

 smooth, growing larger and imbricate on posterior fold. 

 Back and sides covered with small flattened granules,, 

 which change gradually into much larger smooth ven- 

 trals. A dermal fold usually extending along each side 

 between limbs. Tail of moderate length, much flattened. 

 Its scales slightly imbricate, and along its edge, pointed. 

 Limbs very long and slender. Ear-opening large, with- 

 out denticulation. Femoral pores varying from four- 

 teen to eighteen. 



The general color above is grayish, dotted and spotted 

 with white or pale gray, and with indications of dark 

 dorsal blotches which are most distinct in females and 

 young. The top of the head is rich cream, clouded with 

 dark slaty gray. The upper surfaces of the limbs and 

 tail are crossed by more or less undulating bands of dark 

 brown or blackish slate. A dark line, bordered above 

 and below with white, runs along the back of the 

 thigh. The throat is white, more or less clouded with 

 gray. The lower surface of the tail is white with about 

 seven cross-bars of intense black. The belly is whitish. 

 Males have a large blue patch, marked with two oblique 

 wedge-shaped black blotches, on each side. 



The following color description was taken from a fresh 

 male shot at Yurna, Arizona, October 1, 1894: The top 

 of the head is cream; the upper surface of the fore limbs 

 bright lemon yellow; the hind limbs slightly tinged with 

 yellow; neck and fore back pale gray spotted with lighter; 

 back like neck, but suffused with bright lemon yellow, 

 which extends down over the sides and changes to orange 



