1897.] NATURAL SCIENCES OF PHILADELPHIA. 217 



formulate any rule by which typical hudsonicus and its subspecies 

 loquax may be distinguished. Strictly comparable specimens taken 

 at the same season in Maine aud southern New Jersey are in some 

 casQs very similar. The greater relative length of tail and hind foot, 

 however, in the southern animal is fairly diagnostic. The large 

 series taken by Mr. Ingersoll on the mountains of Somerset County 

 are but slightly different from Delaware and Chester County speci- 

 mens, not sufficiently so to warrant their subspecific separation as 

 expressed by the habitat assigned to each by Mr. Bangs. 7 



It is more reasonable to restrict the habitat of typical hudsonicus, 

 as in the case of some other Canadian species ranging into the south- 

 ern Alleghenies, to the northern parts of Pennsylvania. In this case 

 the loquax intermediates of the southern Alleghenies give place on 

 the balsam belts of the Great Smoky Mountains to a dusky, imper- 

 fectly differentiated form which differs almost as much from hudson- 

 icus as does loquax. Some winter skins from Clinton County differ 

 sufficiently in measurements and the character and coior of pelage 

 to be classed more properly with hudsonicus. 



31. Sciuropterus volans (L.). Carolinian Flying Squirrel. 



The smaller flying squirrel abounds in the entire region included 

 in this paper. No specimens have been received from the northern 

 counties. A specimen taken near Renovo, Clinton County, in the 

 collection of Mr. Pierce, is volans. The result of Mr. Bang's in- 

 quiries into the distribution of this animal indicates that the large 

 species, sabrinus, will not be found in the State. 



32. Putorius vison Schreb. Canadian Mink. 



33. Putorius vison lutreocephalus (Harlan). Carolinian Mink. 



From the statements of hunters, added to personal experience, the 

 mink may be said to be numerously and evenly distributed over the 

 entire upland and lowland regions of Pennsylvania. Taken as a 

 whole the Pennsylvania minks are more typical of the southern race, 

 but in the northern mountain streams are very near the Canadian 

 type. 



34. Putorius noveboracensis Emmons. Carolinian Weasel. 



Though rarely seen, this animal is a stranger to no part of the 

 State. In the south its change to the white winter dress seems quite 

 as irregular as the relative severity of the season and amount of 

 snowfall. The winter skins of this animal are often sent to th« fur- 



7 Proc. Biol. Soc, Washn., 1896, pp. 159, 161. 



