Mink-frog. Northern F 



rog. Hoosier Frog. 



Rocky Mountain Frog. 



Plate LXXV. i. Female 

 (Xf). 2. Male (xi). 3- Egg 

 mass (xj). 4. Head of male 

 (Xi). 5. Male (xi). 6. Male 

 (Xf). 



Ran a septentrionalis Baird. 



Range: Northern New Eng- 

 land and northern New York 

 (south to Petersboro, G. S. 

 Miller, Jr.), west to Min- 

 nesota, north in Canada to 

 Hudson Bay. 



Habitat: This is an aquatic 

 frog, found in peaty or sphag- 

 naceous lakes or ponds or in 

 inlets or outlets of such lakes 

 or ponds, particularly where 

 water lilies are growing. 



Size: Adults, 1 7/8-3 

 inches. (Males, 48-71 mm. 

 Females, 48-76 mm.). 



General appearance: This 

 frog is a small representative 

 of the bullfrog — green frog 

 group. The sides are heavily 

 mottled, the rear of the femur 

 heavily reticulated. The back 

 is buffy or brownish olive, al- 

 most uniform, or mottled 

 with large dark areas set off 

 by a tracery of light lines 

 around or amongst them, or 

 spotted with widely separated 

 spots. Sometimes the for- 

 ward part of the back is uni- 

 form and quite green, and 

 the rear part spotted (much 

 like some R. onca). The upper 

 jaw is green. The legs are 

 spotted or with a few bars. 

 The mottling on the femur is 



