206 3. IGUANID/E 



and along the middle line, with a series of eight 'herring- 

 bone' crossbars of dusky, growing pale posteriorly and in- 

 cluding a light spot on the middle linej the six anterior 

 cross-bars are bordered behind by a narrow black line, and 

 all, both in front and behind, by a whitish line which is 

 broader behind than in front; on the sides several rows of 

 indistinct pale spots, many of them bordered anteriorly by 

 dusky; a narrow dusky line across the head between the eyes; 

 an indistinct dusky line from nostrils through eyes to 

 above ear; legs and t^il with indistinct and irregular cross- 

 bands of a lighter shade than the ground color; underside 

 whitish, with an elongated patch of emerald green on the 

 flanks and a more yellowish one on the middle of the throat. 



Length to anus 30 36 49 54- 5 5 59 



Length of tail 49 5 8 85 95 102 



Gular fold to anus 18 23 32 35 37 37 



Snout to ea- , 8 9 II 12 12 13 



Width of head 6 7 9 9 10 10 



Fore limb _ 14 16 22 23 26 27 



Hind limb 18 2+ 31 36 37 38 



Base of fifth to end of 



fourth toe 7 10 14 14 14 16 



Remarks. — Ufa ornata and Uta symmetrica were long 

 regarded as distinct species, but when larger series of speci- 

 mens were collected it was found that none of the supposed 

 differences between them were more than individual varia- 

 tions (see Van Denburgh and Slevin 1911, and Strecker 

 1911). There seems to be no real difference in the regu- 

 larity of the rows of large dorsal scales, the length of the 

 hind leg, coloration, or habitat. 



Schmidt recently has pointed out that in Texan speci- 

 mens enlarged tubercles between the dorsolateral and lat- 

 eral lines are absent or feebly developed, while in those from 

 Arizona oblique series of tubercles in this region are evi- 

 dent. This difference is shown also by my specimens, and 



