AMPHIBIA AND REPTILIA OF COLORADO 259 



by the very large ear; and by the rather uniform yellowish-olive 

 color, the back of the Bullfrog being mottled with brown, or dusky, 

 instead of being distinctly spotted with black, as is the Leopard frog. 



Class REPTILIA 



Family Iguanidae 

 Crotaphytus collaris baileyi (Stejneger) 

 Bailey's Collared Lizard (Fig. 5) 



Naturita, June ii and 15, 1914 (444 and 445); 5 miles west of La Plata-Montezuma 

 County line at Mancos Spring, June, 1913 (284). 



This species was common from Naturita south and west in 1914, 

 and was especially abundant in the rocky bluffs and ridges bordering 

 the Paradox Valley and Basin Creek. It was seldom seen far from 

 rocky ledges. The figure of this species shows the characteristic 

 attitude of this species when surprised or disturbed among the sage- 

 brush. 



Sceloporus consobrinus Baird and Girard 

 Yellow-banded Swift 



Bedrock, Dolores River, April 17-19, 1908 (C.C); Coventry, Montrose County, 

 6,800 ft., April 24, 1908 (C.C); Boulder foothills, above 6,000 ft., August 6, 1913, April 

 21, 1914, and May 10, 1914 (286, 434, and 435); Gypsum Creek, tributary to the Dolores 

 River, July, 1914 (448); Tapagausche Creek, San Miguel County, August i, 1914 (449). 



Specimens of this swift from southwestern Colorado have been 

 referred to the species Sceloporus elongatus Stejneger, a form stated 

 by Stejneger' to be quite close to Sceloporus consobrinus. The speci- 

 mens examined by us from southwestern Colorado do not differ in 

 any tangible character from specimens of Sceloporus consobrinus 

 taken in other parts of Colorado, unless it be in the carination of the 

 scales. The specimens from southwestern Colorado have the keels 

 of the scales a little less evident and a little more restricted to the 

 apical portions of the scales than some of the specimens collected in 

 the foothills near Boulder. Stejneger, I.e., has pointed out this 

 difference between Sceloporus elongatus and Sceloporus consobrinus, 



'N. Amer. Fauna, No. 3, p. 112, 1890. 



