60 UNIVERSITY OF COLORADO STUDIES 



in the United States. Of the many species of this genus but a single 

 species, Rana pipiens, is found in Colorado. 



Rana pipiens Schreber 

 Leopard Frog 



Rana pipiens Schreber, Nalurforscher, Vol. XVIII, p. 185, pi. iv, 1782. 



Rana halecina berlandieri — Yarrow, Wheeler Survey, Vol. V, pp. 526-527, 

 1875 (Denver and San Luis Valley, Colo.); Yarrow, V.S.N.M. Bull. 24, p. 181, 

 1882 (Ft. Garland, Colo.). 



Rana virescens brachycephala Cope — Cope, U.S.N.M. Bull. 34, p. 405, 1889 

 (Medicine Bow Creek — possibly Colorado; Ft. Garland, Colo.). 



Rana pipiens — Cockerell, Univ. Colo. Studies, Vol. VII, p. 130, 1010 (Meeker, 

 seven miles northeast of Meeker, Buford, and five miles above Buford, Colorado; 

 Medano Ranch, Costilla Co., Colo.); Gary, N. Am. Fauna, No. 33, p. 24, 191 1 

 (Vermillion Creek, near Ladore, Colo.). 



A lateral longitudinal fold along each margin of the dorsal surface, 

 and several other, usually four, smaller longitudinal folds in the skin 

 between the lateral folds, these smaller folds often much interrupted; 

 head short, 3 to 3 . 5 in the total length; length of the hind leg reaching 

 forward to the snout or beyond; size medium, length three to four 

 inches. 



General color variable, gray, brownish or usually green; dorsal 

 pattern usually of two or more rows of large, rounded, black spots, 

 margined with yellowish; spots across the dorsal surface of the legs 

 forming rather distinct bars; ventral parts uniform white or yellowish. 



Range, southern Canada south into Mexico, United States gen- 

 erally. Several subspecies of this species have been described but 

 they all intergrade more or less. 



Colorado specimens. — University Museum: Boulder, August 8, 1907 

 (35 mm.), F. Rohwer, No. 196; near Pine Glade School, southwest of Magnolia, 

 August 22, 1907 (2 specimens, 65 and 70 mm.), F. Ramaley, No. 197; Louisville 

 Junction, September 14, 1907 (3 specimens, 40-45 mm.), M. H. Perkins, No. 198; 

 Bluebird Mine, Boulder County, August 5, 1908 (35 mm.), T. A. McHarg, No. 

 199; Meeker, August 6, 1909 (45 mm.), A. H. Felger, No. 52; seven miles north- 

 east of Meeker, August 12, 1909 (9 specimens, 30-80 mm.), A. H. Felger and J. 

 Henderson, No. 59; Julesburg, July 19, 1912 (17 specimens, 20-80 mm.), J. 

 Henderson and M. M. Ellis, No. 200; Alamosa, July 27, 1912 (60 mm.), M. M. 



