1897.J 



LIZABDS OF THE GENUS SCELOPORTJS. 



485 



Olive above ; a more or less distiuct, black, liglit-edged collar ; 

 frequently two light bands on the side of the neck, the upper 

 from the eye and continuous with the anterior border of the collar, 

 the lower commencing at the tip of the snout and passing through 

 the ear ; some specimens with the dorsal scales yellowish or pale 

 greenish, edged with black. Males with the throat and the sides 

 of the belly dark blue, edged with black. Temales whitish 

 beneath, the throat blue or marbled with grey-blue, often with the 

 sides of the belly blue or greenish blue. 



Hah. Arizona, Texas, Mexico (Durango, San Luis Potosi, 

 Jalisco). In the State of JaUsco it occurs at altitudes varying 

 between 3484 and 8500 feet. 



5. SCELOPOEUS OKNATUS. 



Sceloporus ornatus, Baird, Proc. Ac. Philad. 1858, p. 254 ; Cope, 

 Proc. Am. Philos. Soc. xxii. 1885, p. 396 ; Bouleng. Cat. Liz. ii. 

 p. 224 (1885) ; GUnth. Biol. C.-Amer., Eept. p. 72 (1890). 



Head- shields smooth ; frontal broken up into three or four 

 shields ; interparietal as long as broad or a little broader than long, 

 much broader than the parietals ; a series of four or five feebly 

 enlarged transverse supraoculars, bordered inwards by one series of 

 scales and separated from the supraciliaries by two or three ; two 

 canthal scales ; four feebly enlarged scales form a denticulation 

 on the anterior border of the ear. 



Dorsal scales little larger than ventrals, as broad as long or 

 broader than long, rounded behind, feebly keeled, forming parallel 

 longitudinal series ; 60 to 64 scales between the interparietal 

 shield and the base of the tail, 15 or 16 corresponding to the 

 length of the shielded part of the head. Lateral scales feebly 

 keeled, directed upwards and backwards, larger than the dorsals. 

 Ventral scales small, smooth, entire. 60 to 64 scales round the 

 middle of the body. 



The adpressed hind limb reaches the ear; tibia nearly as 

 long as the shielded part of the head ; the distance between the 

 base of the fifth toe and the extremity of the fourth equals the 

 distance between the end of the snout and the ear. 12-17 femoral 

 pores on each side. 



Caudal scales much larger than dorsals, feebly keeled, pointed 

 or shortly mucronate, spinose on the sides. Males with enlarged 

 postanal scales. 



I have examined only two specimens : — 



Olive above, uniform or with darker and lighter spots ; a black 

 or blackish collar, edged with greenish white, not extending across 



