1894.] COLLECTION IN THE NATURAL-HISTORY MUSEUM. 731 



6. 2- 



millim. millim. 



Total length 208 193 



Head 25 28 



Width of head 22 28 



Body 73 77 



Fore limb 43 46 



Hind limb 57 63 



Tail 110 95 



Three specimens (male, female, and half-grown) obtained at 

 Santo Domingo de Guzman, Mexico, by Dr. A. C. Buller. 



Sceloporus heterolepis. (Plate XL VIII. fig. 4.) 



Head small. Head-shields smooth ; one or two more or less 

 irregular series of transversely enlarged supraoculars ; two canthal 

 scales ; occipital large, as long as broad or broader than long ; 

 parietals small, sometimes indistinct ; anterior border of ear with a 

 denticulation formed by three or four pointed scales. Dorsal scales 

 very unequal in size, irregular, some nearly smooth, others 

 strongly keeled ; a pair of vertebral and a latero-dorsal series of 

 large strongly keeled scales form sorts of crests along the body ; 

 ventral scales smooth, mostly bicuspid. The adpressed hind limb 

 reaches the shoulder or the ear ; tibia as long as the shielded part 

 of the head ; the distance between the base of the fifth toe and 

 the extremity of the fourth exceeds the distance between the 

 end of the snout and the posterior border of the ear. 14 to 19 

 femoral pores on each side. Caudal scales as large as largest 

 dorsals, strongly keeled, spinose. Male with strongly enlarged 

 postanal scales. Coloration very much as in S. microle'pis. Greyish 

 or pale brown above, with indistinct darker and lighter blotches 

 and symmetrical blackish markings in the form of transverse or 

 angular lines, the first of which crosses the frontal and supraocular 

 regions ; male with a black bar (sometimes interrupted) across the 

 throat and with a large pale blue blotch ou each side of the belly, 

 broadly edged with blackish blue on the median ventral line. 



.<■ ? : 



millim. millim. 



Total length 135 125 



Head 16 14 



Width of head 14 12 



Body 44 46 



Fore limb 29 26 



Hind limb 39 37 



Tail 75 65 



Several specimens were collected by Dr. A. C. Buller at various 

 localities in the State of Jalisco (La Cumbre de los Arrastrados, 

 Eeal Alto, Biocho La Berberia, Sierra de Bolanos), at altitudes 

 varying between 7800 and 8500 feet. 



