276 NORTHERN GRAY SQUIRREL. 



have bare ears, and two (one of them being of the black variety) have 

 the ears fringed ; differing in no other respect, except the general fuller 

 development of the hair, from the other specimens of their respective 

 varieties." 



We are moreover under an impression that the specimen of the North- 

 ern Gray Squirrel, from which Dekay took his measurement, must have 

 been a young animal. He gives head and body, eight inches ; tail, eight 

 inches five lines. Out of more than fifty specimens that we have mea- 

 sured in the flesh, there was not one that measured less than ten inches 

 in body and eleven inches in taO. 



The true S. cinereus or S. vvlpinus has moreover not the same geogra- 

 phical range as the Northern Gray Squirrel. It is not found in Canada, 

 where the present species is common, nor in the most northerly parts of 

 either New York or the New England States. We obtained several 

 specimens from the New York market, and as we have shown in our ar- 

 ticle on S. cinereus, it is occasionally found in the southern counties of 

 the State ; but it is a very rare species north and east of Pennsylvania, 

 and is principally confined to the Middle and some of the South-western 

 States. 



The Northern Gray Squirrel (S. tnigratorius) may be easily distinguish- 

 ed from the Carolina Gray Squirrel (S. Carolinensis) by its larger size, 

 broader tail, and lighter gray colours on the sides, and by its smaller 

 persistent tooth. 



(S. cinereus or S. vulpinus differs from this species in being a little 

 longer, having a much stouter body and legs, and a longer tail. It has, 

 in proportion to its size, shorter ears, which are more rounded, and 

 have the tufts or fringes in winter much shorter. The fur is also 

 coarser, and it has in each upper jaw but four teeth, dropping its milk- 

 tooth when very young, whilst the Northern Gray Squirrel {S. migra- 

 toriiis) has five on each side, which appear to be permanent. 



