igoo] SoRNBORGER FlYING SqUIRREL. 49 



% Black. % Red. % Yellow. % White. 



y , , . (Above...'. 40. 40. Is. 5. 



Labrador specimens ^ „ i -^ 



^ ( Below .... 10. 17. 13. 60 . 



Moose Factory specimen < ,-, i ^ 



■^ ^ ( Below 3 . 1 . 32 . 64 . 



Above, however, it is darker than the table shows. Only 

 tawny areas were matched with the colour top, the scattered 

 black hairs and the black tips of the party-coloured hairs were, so 

 far as possible, ignored since it was impracticable to accurately 

 measure. their effect. 



The proportions ot colours on the party-coloured hairs of a 

 number of specimens from various localities are approximately : 



Plumbeous. Tawny. Black. 



Labrador specimens 17 . 



Moose Factory 15. 



Cumberland House 19. 



Matamag-aminque, Canada . . 17. 



The skin from Cumberland House is the 

 Labrador form in the colour of the back of any I have examined. 



Perhaps the most noticeable character of inakkovtkensis is the 

 sooty tail, which is darkened for more than half its length. A skin 

 in the collection of Mr. C. F. Batchelder, from Tadousac, Quebec, 

 though immature and in summer pelage, approximates this condi- 

 tion, and it would seem to show that the conditions producing the 

 dark form are operative at least so far west on the north shore of 

 the St. Lawrence as the Saguenay River. 



From a comparison of the measurements given in this article 

 .S". s. fnakkovikeusts may be- assumed to be the largest of North 

 American flying-squirrels with perhaps the exception of 5". alpimis 

 (and specimens from Alaska ? ). 



My acknowledgments are due to Mr. Outram Bangs, Mr. C. 

 F. Batchelder, Mr. Gerrit S. Miller, Jr., of the U. S. National 

 Museum, and particularly to Dr. Walter Faxon, of the Museum of 

 Comparative Zoology, for the use of material and for other 

 favours received. 



