258 UNIVERSITY OF COLORADO STUDIES 



It may be seen from the above that the three types of color pattern 

 given as characteristics for Chorophilus nigritus LeConte, Chorophilus 

 feriarum Baird, and Chorophilus triseriatus Wied, by Hay,^ as well 

 as several other combinations of these characters, occurred in this 

 single collection. All of these specimens were of the same proportions, 

 having the length of the body i . 3 to i . 5 in the length of the hind 

 leg, the anatomical character diagnostic of Chorophilus triseriatus 

 Wied. 



Acris gryllus (LeConte) 



Cricket Frog (Figs. 6 and 7) 



Wray, August, 1913. 



Family Ranidae 



Rana pipiens Schreber 



Leopard Frog 



Greeley, September 28, 1902 (C.C.); Medano Ranch, Costilla County, June 24, 

 1902 (C.C); Buena Vista, 8,500 ft., June, 1914; Alma, Park County, above 10,000 ft., 

 August, 1914 (494); Lake George, 8,000 ft., September 28, 1914 (49S); Florissant, 8,200 

 ft., September 28, 19 14 (496). 



The Leopard Frog has been reported as very abundant near all 

 of the ponds and lakes in eastern Colorado by numerous corre- 

 spondents. 



Rana catesbeana Shaw 

 Bullfrog 



This species of frog has been introduced from the East into several 

 ponds and reservoirs in the upper South Platte valley during the past 

 two years. At present the results seem rather discouraging to those 

 interested in introducing this frog because of its economic importance, 

 as the species is not well established. If found, the adults of this 

 species are easily recognized by their large size, large individuals 

 frequently reaching the length of 12 inches from tip of snout to tip 

 of the outstretched hind leg. Bullfrogs of any size may be dis- 

 tinguished from the Leopard frog by the absence of the lateral folds 

 of skin so prominent on the edges of the back of the Leopard frog; 



» Rep. Slate Geol. Ind., for 1891, p 470, 1892. 



