230 IGTJANID^. 



Head-shields smooth ; a series of four or five transversely dilated 

 supraoculars, the widest not measuring more than half the width of 

 the supraocular region ; two canthal scales ; occipital as long as 

 broad, or a little longer than broad, larger than the parietals ; ante- 

 rior border of ear with a strong denticulation, formed of three or 

 four large pointed scales. Dorsal scales larger than ventrals, strongly 

 keeled, slightly mucronate, tricuspid, forming parallel longitudinal 

 series ; forty-two to forty-four scales between the occipital shield 

 and the base of the tail ; nine or ten scales correspond to the length 

 of the shielded part of the head ; lateral scales keeled, directed ob- 

 liquely upwards, a little smaller than dorsals ; ventrals smooth, 

 hi- or tricuspid ; forty-two or forty-four scales round the middle of 

 the body. The adpressed hind limb reaches the axilla or the cer- 

 vical fold ; tibia slightly shorter than 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 

 posterior border of the ear. Twelve to seventeen femoral pores. 

 Caudal scales as large as, or a little larger than dorsals. Male with 

 enlarged postanal scales. Eeddish browm above, with a greyish 

 vertebral band and one or two yellowish lateral bands on each side ; 

 dark-brown spots between the longitudinal bands ; a blackish streak 

 at base of humerus ; lower surfaces yellowish white, uniform in 

 the female ; male with a small blue spot on each side of the throat, 

 and an elongate black-margined blue blotch on each side of the 

 belly, the white interspace between them measuring twice their 

 width. 



njillim. millirn. 



Total length 136 Fore limb 23 



Head 14 Hind limb 34 



Width of head ... 11 Tail 79 



Body 43 



N. America, Mexico. 



a-c. (S 5 . Dacota. Zoological Society. 



(Types of S. garmani.) 

 (I. S , bad state. Putla, Mexico. 



13. Sceloporus gratiosus. 



Sceloporus graciosus, BairdS) Gir. Proc. Ac. Philad. 1852, p. 69, and 



in Simisb. Exped. Gr. Salt Lahe, p. 346, pi. v. tigs. 1-3 ; Cojie, 



Proc. Am. Philos. Soc. xxii. 1885, p. 395. 

 gracilis, Paird Sf Gir. Proc. Ac. Philad. 1852, p. 175; Girard, 



U.S. Explor. P:rped., Ilerp. p. 386, pi. xx. figs. 1-9 ; Bocourt, 



Miss. Sc. Mex., Pej}t. p. 190, pi. xviii. fig. 4. 



Head-shields smooth ; a series of feebly dilated transverse supra- 

 oculars ; two canthal scales ; occipital very large, as broad as long ; 

 parietals very small, two on each side ; anterior border of ear with 

 a strong denticulation, formed of four or five pointed scales, which 

 are a little larger than those preceding. Dorsal scales larger than 

 ventrals, keeled, sharply pointed, forming parallcllongitudinal lines ; 



