380 IlJinois State Lahoratovti of Natiinil Histonj. 



Rana silvatica, LeC. Wood Frog. 



Rana sylmtim, LeC, Ann. Lye. Nat. Hist. N. Y., 1825, 1., p. 282. 



— Dum. et Bibr., Erp. Gen. 1841, VI IL, p. 3<32 ^ Holbr., 



K. A. Herp., 1842, IV., p. 99, pi. 24. 

 Rana tem'jxjraria, subsp. silvatica, Cope, Check List N. A. Batr. 



and Rept., 1875. 

 Rana silvatiea, Boalenger, Cat. Batr. Sal. in Coll. Brit. Mus., 2d 



ed., 1882, Sal. Ecaadata. 

 Rana. temporaria, subsp. syhxitim, Davis and Rice, Bull. 111. 



State Lab. Nat. Hist., I., No. 5, 1883, p. 25; Ball. Chicago 



Acad. Sci., 1883. 



Body about two inches long ; slender. Males with no 

 saccular dilations of the skin at the angles of the mouth. 

 Glandular folds present. Femora granulate beneath. Head 

 small, obtusely pointed. Nostrils slightly nearer the tip of the 

 snout than to the anterior border of the eye. Tympanum very 

 small. Margins of webs between the toes incurved. 



Color above reddish brown, uniform in adults, more or less 

 mottlec with obscure dusky marks in young examples. A dark 

 brown or black spot, which rapidly widens posteriorly, extends 

 from the nostril through the eye, includes the tympanum, and 

 is obliquely truncate above the anterior legs. Below this spot 

 is a yellow band which in adults is lost in the ground color on 

 the side of the snout, but in the young continues to the tip of 

 the snout. Anterior legs with obscure dusky marks, with a 

 distinct black dash at the bases of the humeri. Posterior legs 

 with transverse dusky bands. Body white beneath, yellowish 

 posteriorly, sometimes with faint dusky marks anteriorly. 



Length of body, 1.52 ; from tip of snout to axilla, .60 ; 

 femur, .72 ; tibia, .74 ; tarsus and fourth toe together, LOO. 



Northern Illinois, Peoria (Brendel). 



This is the most nearly terrestrial of all our Range. It is 

 generally found in oak woods among the fallen leaves. It is 

 one of the first species to awake from hibernation in the spring 

 and resorts at once to the water to breed. This accomplished, 

 it leaves the water and is not again found in it during the re- 

 mainder of the season. The eggs were found by Prof. Putnam 

 in Massachusetts, as early as the 18th of April, attached in a 

 mass to a spear of grass. It feeds upon insects. 



