56 UNIVERSITY or COLORADO STUDIES 



Bufo cognatus Say 



Say's Toad; Western Toad (Figure i, Plate I) 

 Bufo cognatus Say, Long's Exped. Rocky Mis., Vol. II, p. 190, 1823. 

 Bufo lentiginosm cognatus— Y akro^ , Wheeler Survey, Vol. V, p. 521, 1875 

 (Ft. Garland, Colo.); Yarrow, U.S.N.M. Bull. 24, p. 165, 1882 (Ft. Garland, 



Colo.). 



Bufo lentiginosus frontosus—YA^RROW, U.S.N.M. Bull. 24, p. 165, 1882 (Colo- 

 rado Springs, Colo.). 



Bufo cognatus— Cope, U.S.N.M. Bull. 34, p. 277, 1889 (Ft. Garland, Colo.); 

 DiCKERSON, Frog Book, pi. xxxii, fig. 90, 1907 (Denver, Colo.) ; Cockerell, Univ. 

 Colo. Studies, Vol. VII, p. 130, 1910 (Medano Ranch, Costilla Co., Colo.). 



Head quite short, much wider than long, its length about 5 in the 

 total length; parotoids large and oval; size large, length three to six 



inches. 



General color yellowish brown, gray or greenish; dorsal pattern 

 of large blotches of a rather bright dark brown or black, giving the 

 toad a very conspicuous marking, these spots often more or less con- 

 fluent; a distinct pale, mid-dorsal stripe; ventral parts yellowish. 



A Western plains species, coming into the foothills region. 



Bufo Cognatus. — Diagram of Bony Crests 



Colorado specimens. — University Museum: Medano Ranch, Costilla 

 County, July 2, 1909 (2 specimens, 50 and 55 mm.), E. R. Warren, No. 189; 

 Julesburg, July 19, 191 2 (100 mm.), J. Henderson, No. 190; Brighton, July 26, 

 1912 (9 specimens, 20-35 mm.), J. Henderson, No. 191; Colorado State Historical 

 and Natural History Museum: Wray, June 15, 1902 (100 mm.), H. G. Smith; 

 State Teachers' College Museum: Greeley, A. E. Beardsley. 



Family Hylidae 



The tree frogs are small amphibians, which, although they still lay 

 their eggs in the water, have become more or less arboreal as adults. 

 This habit has been made possible by the development of adhesive 



