THE GEISTUS CISTEMIDOPHORUS. 41 



scales. Legs rather short, hind foot reaching to half way between humerus and 

 auricular meatus. 



Size above medium for the genus. Length of head and body to vent (tail in- 

 jured) 110 ram. ; length of head to angle of mandible, 26 mm. ; do. to collar 34 mm. ; 

 do. to axilla 42 mm. ; do. to fore leg HI mm. ; do. of fore foot 25 mm. ; do. of poste- 

 rior leg 71 mm. ; do. of hind foot 35 mm. 



Color above Hght olivaceous brown, transversed by seven longitudinal broad 

 black stripes, threie on each side and one on the middle line. On the lumbar region 

 the median band disappears, and the pale intervals are wider than the black ones ; 

 anteriorly the pale ground assumes its normal relation of stripes on a black ground. 

 The inferior commences at the orbit and passes over the tympanum ; the next begins 

 above the anterior border of the orbit and marks the external borders of the supra- 

 orbital plates. The next issues from a parietal plate. Anteriorly the black inter- 

 spaces have a few small spots ; posteriorly they become undulate through lateral 

 emarginations, and more posteriorly the first and second stripas are broken up into 

 quadrate spots, the third remaining unbroken. The hind legs are very indistinctly 

 marbled on an olive-gray ground. The fore legs are coarsely reticulated with black 

 on an olive ground. The lateral dark strip3s extend to the orbit, and there is a 

 blackish shade on the side of the muzzle, just below the canthus rostralis. Lower 

 surfaces everywhere yellowish, unspotted, except a few black specks on the inferior 

 labials and sides of the gular region. Tail olive above, yellowish below. 



This species belongs to the C. sexlimatus series, as indicated by the scales of 

 its collar, but it has the coarse scales of the C. tessellatus. Its six infralabial 

 scales are found only in the former series. Its coloration resembles in some degree 

 the stage of the C. tessellatus tessellatus, called by Baird and Girard C. tigris, but it 

 has seven stripes instead of four, and the lateral stripes are broken up and not the 

 median, as is the case in the latter. It also differs fi'ora the latter in the marking of 

 the fore leg, and nearly uniform coloration of the hind leg; the reverse being the case 

 in the C. tessellatus. The striping of the head is also not seen in the latter. The 

 head is also narrower in proportion to its length. 



This, perhaps the handsomest species of the genus, is represented in the collec- 

 tion by an adult female only. It represents the C. sexlineatus in California. 



Cnemidophorus septemviitatus Cope. 



Catalogue Number. 



Number Specimens. 



Locality. 



Whence obtained. 



Nature of Specimen. 



287-3 



1 



El Dorado Co., Cal. 



Dr. C. C. Boyle. 



Alcoholic. 



A. P. S. — VOL. XVII. F. 



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