262 UNIVERSITY OF COLORADO STUDIES 



Pityophis catenifer sayi (Schlegel) 

 Eastern Bull Snake 



Greeley, June 15, 1902 (C.C.); Marshall, Boulder County, May 19, 1914 (441); 

 Hortense Hot Springs, near Buena Vista, about 9,000 ft., June 8, 1914 (497). 



This bull snake is quite common in the upper Arkansas River 

 valley near hot springs. Several persons assured us that large 

 specimens of this species were often seen about the Hortense and 

 Cottonwood Springs late in November. 



Pityophis catenifer bellona (Baird and Girard) 

 Great Basin Bull Snake 



Douglas Spring, Moffat County, June 25, 1907 (C.C.); Naturita, June 15, 1914 

 (457); reported as fairly common from Naturita to Little Gypsum Creek in 1914 by 

 Henderson. 



Tropidonotus sipedon fasciatus (Linnaeus) 

 Water Snake 



Greeley, May 12, 1903 (C.C.). 



Liopeltis vernalis (DeKay) 

 Little Green Snake 



Several reports of this little snake have reached us from the upper 

 South Platte River valley and Park County. One of these reports, 

 which seemed reliable in every detail, mentions this snake as occurring 

 above 9,500 feet. We have no specimens from this part of the state, 

 although we have previously recorded this snake from Palmer Lake, 

 El Paso County.^ There is a specimen of this snake in the Museum 

 of the State Agricultural College, from Steamboat Springs, Colorado. 



Zamenis constrictor flaviventris (Say) 

 Blue Racer 



Boulder, September 11, 19 13 (289). 

 ' Univ. Colo. Studies, Vol. X, p. 100, 1913. 



