The Northern Wood Frog. Cambridge Frog, 



Plate LXIV. (x|). 1,4, 5. 

 Females. 2, 3. Males. 



Ran a cantabrigensis Baird. 



Range: Alaska and British 

 Columbia, through the low- 

 lands east to Michigan and 

 Ontario. 



Habitat: Terrestrial except 

 at breeding periods, living in 

 woods amongst dead leaves 

 or moss. 



Size: Adults, 1 2/5-2 1/4 

 inches. (Males, 36-50 mm. 

 Females, 37-56 mm.). 



General appearance: This is 

 a short-legged northern form 

 of the wood-frog, with a dark 

 vitta or mask from the eye 

 over the tympanum, and 

 with a light line along the 

 jaw. Many of these small 

 wood-frogs are grayish in 

 color with an irregular dark 

 brownish band on the back, 

 and a light median dorsal 

 stripe. In some, this stripe ex- 

 tends from snout to vent, in 

 others, to varying distances 

 or is entirely lacking. There 

 is a prominent dark brown 

 stripe on the snout joining 

 the dark mask back of the 

 eye. This is bordered below 

 by a light yellowish or buffy 

 stripe. The costal fold is 

 bronzy. In many frogs, there 

 may be dark spots bordering 

 the costal fold below, on the 

 dorsum or on the sides. Some 

 are almost free of dark spots. 

 The throat and breast are 

 usually speckled. The major- 

 ity of wood-frogs from Pem- 



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