40 



A SYNOPSIS OF THE SPECIES OF 



Cnemidophorus variolosus Cope. 



Catalogue Number. 



Number Specimens. 



Locality. 



Where obtained. 



Nature of Specimen. 



3066 



1 



Parras Coahuila. 



Lieut. Couch, U.S.A. 



Alcoholic. 



Cnemidophorus octolineatus Baird. 



Proceeds. Academy Phiia., 1858, p. 255. 



U. S, Mexic. Boundary Survey, II, 1859, Pt. II, Reptiles, p. 10. 



Cope, Check List Batr. Rept. N. Amer., 1875, p. 45. 



This species differs from the young specimens of the C tessellatus of equal size, 

 in the small number of its femoral pores, and in the absence of spots on the hind 

 limbs and sides, as well as in the additional pair of median longitudinal stripes. The 

 single known specimen is apparently adult, and is about equal in size to a half-grown 

 (7. tessellatus, and smaller than the C. variolosus. 



Cnemidophorus inornatus Baird. 



Proceeds. Acad. Phila., 1858 (Dec), 255. 



Rept. U. S. Mex. Bound. Survey, II, 1859, Pt. II, Rept., p. 10. 



Cope, Check List Batr. Rept. N. Amer., 1875, p. 45. 



This species is distinguished by a combination of characters. The rough scales 

 are peculiar to it, and it is the only species known to me in which the rows of brachial 

 plates exceed the femoral in number. It is the smallest species, and yet shows no 

 indication of stripes. 



Cnemidophorus septemvittatus Cope. 



Scales of collar large, in three transverse rows, the largest row on the edge ; 

 scales of mesoptychium small, flat, those of gular region longer. Head narrower than 

 in any other species, the first and second supraorbital plates longer than wide, the 

 fourth well developed. Interparietal plate twice as long as wide, considerably nar- 

 rower than the parietals ; both bounded posteriorly by some small plates. Loreal 

 much longer than postnasal ; no frenoorbital. Infralabials six on each side, the first 

 pair in contact throughout. Dorsal scales coarse, round, projecting upwards at their 

 posterior bordei'. Brachial scales in six rows, antebrachials in three. One row of very 

 large post-antebrachials, bounded by smaller ones. Femorals in eight rows, tibials in 

 three. Femoral pores 16-18. Anal plates only three, separated from vent by a wide 

 granular space, and surrounded anteriorly and laterally by one row of small flat 



