482 



ilU, G. A. BOULENGEitt ON THE 



[May 18, 



towards the median line ; 33 to 39 scales between the interparietal 

 shield and the base of the tail ; 8 or 9 scales, taken in the middle 

 of the back, correspond to the length of the shielded part of the 

 head. Lateral scales keeled, graduating into the dorsals and 

 veutrals, directed obliquely upwards and backwards. Ventral 

 scales small, smooth, bi- or tricuspid. 40 to 44 scales round the 

 middle of the body. 



The adpressed hind limb reaches the shoulder or 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. 

 14 to 18 femoral pores on each side. 



Caudal scales as large as dorsals, strongly mucronate. Males 

 with enlarged postanal scales. 



Dark olive above, with a black uninterrupted nuchal collar, 

 which may be more or less distinctly edged with yellowish or 

 greenish ; sides of belly dark-blue, black-edged in both sexes ; 

 midcQe line of belly white ; a patch of blue may be present on the 

 throat, the greater part of which is black or dark olive. 



Hah. This species is only known from the mountains of the 

 State of Jalisco, at 4400 "to 8500 feet altitude, \\-here it was 

 discovered by Dr. A. C. Buller. 



3. SCELOPOEUS MELANOEHINUS. 



Sceloporus melanorhimis, Bocourt, Journ. de Zool. v. 1876, 

 p. 401 ; Sumichrast, Bull. Soc. Zool. Trance, 1880, p. 176 ; 

 Bouleng. Proc. Zool. Soc. 1894, p. 730. 



Snout much flattened. Head-shields large and smooth ; frontal 

 transversely divided and separated from the interparietal by the 

 frontoparietals or by a small azygous shield ; interparietal a little 

 broader than long, as broad as or broader than the parietals, 

 which are large and broader than long ; a series of four large 

 transverse supraoculars, separated from the frontal and from the 

 supracUiaries by one series of small scales, the fourth in contact 

 with the parietal ; two canthal scales ; ear-opening nearly hidden 

 under the large pointed scales in front of it. 



Dorsal scales much larger thau ventrals, as broad as long, 

 strongly keeled and mucronate, entire or feebly denticulate, 



