68 UNIVERSITY OF COLORADO STUDIES 



aa. Supraorbital plates in five rows; inside row of small plates, second and 

 third rows of larger, subequal plates, fourth and fifth rows of small plates 

 and more or less irregular. . . . S. graciosus Baird and Girard. 



Sceloporus consobrinus Baird and Girard 

 Yellow-Banded Swift {Figures lo and ii) 

 Sceloporus consobrinus Baird and Girard, in Marcy, Rept. Red River Reptiles, 



P- 237, 1853- 



Sceloporus consobrinus — ^Yarrow, Wheeler Survey, Vol. V, p. 574, 1875 

 (Pagosa, Colo.); Gary, N. Am. Fauna, No. 2>i^ P- 26, 191 1 (Douglass Spring, 

 Escalante Hills, LaVeta and Arboles, Colo.). 



Sceloporus undulatus — Elrod, The Museum, Vol. I, p. 137, 1895 (Garden of 

 the Gods, Colo.); Cockerell, Univ. Colo. Studies, Vol. VII, p. 131, 1910 (Meeker, 

 Colo., and four miles west of Meeker, Colo.). 



Sceloporus elongatus — Gary, N. Am. Fauna, No. 2)2>j P- 26, 191 1 (Arkins, 

 Escalante Hills, Meeker, Rangeley, Plateau Creek and McElmo, Colo.). 



Head somewhat pointed anteriorly, widest in the region of the 

 eyes and very sUghtly narrower behind the eyes, length of the head 

 about 1 . 5 in the length of the hind foot, profile sloping; supraorbital 

 plates in four rows, the inside row of small plates, a second row of 

 large plates, the two outside rows of small plates; a pit on each side 

 of the neck near the ear opening, guarded by large scales and lined 

 with very small scales; length from tip of snout to the vent not more 

 than 1 . 5 in the length of the tail; total length six to eight inches. 



General color yellowish or greenish gray; two stripes of yellow or 

 a yellowish gray lighter than the ground color, on each side; the 

 upper of these stripes the brighter, covering two or three rows of 

 scales; the lower separated from the upper by seven to nine rows of 

 scales, and covering three or four rows of scales, quite suffuse along 

 its ventral margin; between the two light stripes, the ground color 

 may be slightly darker than the general ground color, producing a 

 dark stripe; dorsally with many very fine cross bands of black, these 

 bands often being less than a half of a milhmetre wide but so dark as 

 to be quite distinct; ventral parts whitish or yellowish, rarely green- 

 ish, with quite a few small black or dark brown dots; throat of the 

 male with a bright peacock blue band, traces of which may appear in 



