49. SCELOPORUS. 231 



fifty-two to fifty-six scales between the occipital shield and the base 

 of the tail; twelve or thirteen (or fourteen) scales corresjoond to the 

 length of the shielded part of the head ; lateral scales keeled, 

 directed obliquely upwards, a little smaller than dorsals ; ventrals 

 smooth, more or less distinctly bicuspid ; fifty or fifty-two scales 

 round the middle of the body. The adpressed hind limb reaches 

 between the shoulder and 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 equals the distance between the end of the 

 snout and the middle of the oblique cervical fold. Sixteen to 

 eighteen femoral pores. Caudal scales larger than dorsals. Male 

 with enlarged postanal scales. Olive above, with two light yellowish 

 bands along each side, and series of blackish spot^?:, sometimes con- 

 fluent into longitudinal bands ; male with a blue, black-edged patch 

 on each side of the body and some irregular blackish spots on the 

 throat. 



millim. millim. 



Total length (tail re- Body 31 



produced) 80 Fore limb 17 



Head 11 Hind limb 28 



Width of head .... 8-5 



Western North America and Mexico. 



a. J ■ California. J. K. Lord, Esq. [P.]. 



b, c. 2 • Piitla, Mexico. 



14. Sceloporiis couchii. 



Sceloporus couchii, Baird, Proc. Ac. Philad. 1858, p. 2o4. 



" Cephalic plates smooth. Scales very small. About eighty oblique 

 dorsal rows from head to tail. Eemoral pores twenty-five. Colour 

 above dark green, with two lateral light stripes, separated by eigh- 

 teen rows of scales. Back with irregular spots. Sides with a white 

 band from groin. An obsolete dark indigo patch on each side of the 

 belly, widely separated below. Sides of jaws banded transversely 

 with blue and whitish. A subcircular indigo patch in front of 

 shoulder, surrounded by light blotches." 



Santa Cateriua, N. Leon. 



15. Sceloporus grammicus. 



Tropidolepis grammicus, Graif, Cat. p. 209. 

 Sceloporus granmiicus, Wicf/m. Isis, 1828, p. 370, mul Ilerp. Mex. 



p. 51 ; Bocourt, Miss. Sc. Mex., Rcpt. p. l02, pi. xviii. bis. tig. 12 ; 



Cope, Proc. Am. Pkilos. Soc. xxii. 1885, p. 395. 



pleuro.stictus, Wiegm. Isis, 1828, p. .')70. 



Tropidolepis grammicus, Gray, Ciriff. A. K. ix. Syn. p. 43 ; Dum. ^■ 



Bibr. iv. p. 308. 

 Sceloporus beterurus, Cope, Proc. Ac. Philad. 18G6, p. 322. 



Head-shields smooth or slightly rugose ; a series of feebly dilated 



