386 Field Museum or Natural History — Zoology, Vol. XL 



'^ OF MEXICO ^^ 



y ^ Area of intergradation 



Map illustrating supposed distribution of species belonging to the genus Muslela Cexcept M. 

 pennanti) in eastern United States and Canada. 



Mustela americana Turton. Type locality — Eastern North America. De- 

 scription as previously given. 



Mustela a. ahieticola Preble. (N. Amer. Fauna, No. 22, 1902, p. 68.) Type lo- 

 cality — Cumberland House, Saskatchewan, Canada. "Much larger than 

 Mustela americana; dentition heavier" (Preble). 



Mustela a. brumalis (Bangs). (Amer. Nat., XXXII, 1898, p. 502, fig. .) Type 



locality — Okak, Labrador. Larger and darker than americana. 



Mustela atrata Bangs. (Amer. Nat., XXXI, 1897, p. 162.) Type locality — Bay 

 St. George, New Foundland. Decidedly darker brown and throat patch tinged 

 with orange. 



