REPTILES OF THE PACIFIC COAST. 69 



16. Uta graciosa (Hallo well). LONG-TAILED UTA. 



Urosaurus graciosus HALLOW., Proc. Acad. Nat. Sci. Phila., 1854, 

 p. 92 (type locality "Lower [^Southern] California);" id., 

 Kept. U. S. Pac. R. B. Surv., Vol. X, pt. IV, 1859, p. 4, pi. VII, 

 figs, la-le. 



Description. Body and tail very slender, former as 

 well as head slightly depressed. Snout rounded but 

 rather narrow, with nostrils opening in small round 

 plates, much nearer to end of snout than to orbit. 

 Plates on head moderately large, smooth and almost flat; 

 interparietal largest. Frontal plate usually divided 

 transversely. Inner series of enlarged supraoculars 

 separated from frontal, frontoparietal, and parietal 

 plates by one or two rows of granules. Superciliaries 

 long, slightly projecting laterally, strongly imbricate. 

 Central subocular very long, narrow and strongly keeled. 

 Rostral and six or seven supralabials long and low. 

 Symphyseal plate moderately large and followed by a 

 series of plates separated from infralabials, except first 

 pair, by one or two series of sublabial plates. Gular 

 region covered with small, smooth, subhexagonal gran- 

 ules, which increase in size on, and are largest at edge 

 of, strong, transverse gular fold. Ear-opening large, 

 with denticulation of two or three scales, one being 

 much larger than the others. Sides of neck and body 

 more or less folded. About 

 five to eight rows of imbri- 

 cate, keeled, equal-sized 

 scales forming a band down 

 middle of back and changing very abruptly to granules 

 on its sides. Some scales on upper lateral fold enlarged. 

 Largest scales on the tail, larger above than below, and 

 strongly keeled but not pointed. Posterior surfaces of 

 thighs and arms covered with small granules similar to 

 those on sides of body. Superior and anterior surfaces 



