160 Bangs The Squirrels of Eastern North America. 



suffused with rusty yellow ; a broad black stripe along side separating 

 colors of upper and under parts. 



Cranial characters. Skull light, developing very slight lateral ridges 

 with age ; rostrum short and blunt ; nasals ending atfronto-premaxillary 

 suture; postorbital process of frontal light and long; zygoma standing 

 out squarely from root, and more flaring than in either the fox or gray 

 squirrels; audital bullse large. Penultimate upper premolar either ab 

 sent or present in the adult, though more often absent, and when present 

 very minute. 



Size of an average adult skull: basilar length, 38.4; occipitonasai 

 length, 45; zygomatic breadth, 26.2; greatest height of cranium above 

 palate, 15.6; greatest length of single half of mandible, 26.4. 



Size. Average measurements of four adult specimens from Hamilton 

 Inlet, Labrador: total length, 309; tail vertebra?, 120.5; hind foot, 47.75 

 (all four are very old adults and the averages therefore large). Average 

 measurements of ten adult specimens from Digby, Nova Scotia: total 

 length, 296.5; tail vertebrae, 118.2; hind foot, 45.2 



General remarks. Sciurus hudsonicus has but one bad synonym the 

 Sciurus rubrolineatus of Desmarest. Desmarest based his name wholly on 

 the 'Ecureuil rouge (species nova)' of the French edition of Warden's De 

 scription of the United States, published in 1820. Warden described 

 under this name a red squirrel in winter pelage, assigning it no habitat. 

 It is the only red squirrel Warden gives, and it is impossible to say which 

 race it belonged to. In addition to Sciurus rubrolineatus Desmarest gives 

 Sciurus hudsonius, his description of the latter being taken from a summer 

 specimen. It is evident that the great difference between summer and 

 winter specimens alone led Desmarest into the belief that there are two 

 species of red squirrels. 



Sciurus hudsonicus typicus belongs to the spruce and fir belt and only 

 extends south as far as these trees. Wherever the Transition and Cana 

 dian faunas meet, as in central New York, New Hampshire, and Minne 

 sota, intermediates between hudsonicus typicus and hudsonicus loquax 

 occur. Only a very short distance south, however, into truly Transition 

 country loquax is found in the typical form. 

 Specimens examined. Total number, 89, from the following localities: 



Labrador : Hamilton Inlet, 4. 



Nova Scotia: Digby, 16; Granville, 4; James River, 1 ; Schenacidae 

 (Cape Breton), 6. 



New Brunswick : Catnpobello Island, 9. 



Quebec : Lake Edw r ard, 5. 



Ontario : North Bay, 8 ; Nepigon, 1 ; Peninsula Harbor, 10. 



Saskatchewan:Batoche, 5. 



Maine : Greenville, 5; Upton, 5. 



West Virginia : White Sulphur Springs, 1. 



North Carolina : Roan Mountain, 4. 

 Intermediates : 



New Hampshire : Franconia, 2 ; Antrim, 1. 



New York: Peterboro, 1. 



