AMPHIBIA AND REPTILIA OF COLORADO 53 



Bufo boreas Baird and Girard 

 Mountain Toad; Columbian Toad 



Bufo boreas Baird and Girard, Proc. Acad. Nat. Sci. Phtta., p. 174, 1852. 



Bufo microscaphus — Yarrow, Wheeler Survey, Vol. V, p. 523, 1875 (South 

 Park, Colo.); Yarrow, U.S.N.M. Bull. 24, p. 162, 1882 (South Park, Colo.). 



Bufo columbiensis — Cope, U.S.N.M. Bull. 34, p. 271, 1889 (South Park 

 Colo.) ; Young, Proc. Acad. Nat. Sci. Phila., p. 298, 1909 (east slopes of Arapahoe 

 Peaks, Boulder Co., Colo.). 



Head short, widest just back of the eyes, its length 4 or a little more 

 in the total length; muzzle long and sloping; fore-arm longer than the 

 hand; glands on the tibia; size medium, length up to five inches. 



General color brownish or greenish gray; sides with numerous 

 irregular fight colored blotches; usually a fight colored area near the 

 posterior angle of the mouth; ventral parts yellowish, whitish or 

 even greenish, much mottled with black; tubercles of the feet black; 

 tips of the digits dark brown. 



Range, Colorado north and west to Puget Sound. In this state 

 found only in the mountains. 



Colorado specimens. — University Museum: Redrock Lake, above Ward, 

 July 21, 1907 (75 mm.), G. S. Dodds, No. 179; Copeland Park, Boulder County, 

 September 5, 1907 (3 specimens, 45-90 mm.), S. A. Rohwer, No. 180; Park Lake, 

 Tolland, July, 1909 (2 specimens, 85 and 90 mm.), F. Ramaley, No. 181; Black 

 Canyon, Tolland, August 29, 1912 (60 mm.), A. G. Vestal, No. 182; Colorado State 

 Historical and Natural History Museum: Cumbres Pass, August 1, 1902 (75 mm.), 

 W. C. Ferril; State Teachers' College Museum: Chamber's Lake and Grand 

 Mesa, A. E. Beardsley. 



Bufo debilis Girard 



Sonoran Toad 

 Bufo debilis Girard, Proc. Acad. Nat. Sci. Phila., p. 87, 1854. 

 Head short, its length about 4 . 5 in the total length ; muzzle trun- 

 cate; hind leg short, its length equal to that of the head and body; 

 parotoid glands large, widening posteriorly so as to be roughly 

 triangular in outline; size small, rarely exceeding two inches in 

 length. 



General color brownish to ashy gray; small tubercles black; legs 



