ARCTOMYS. 



posteriorly. First premolar slightly smaller than the second; palate 

 broad, of nearly equal width throughout its length: bulla' inflated, 

 moderately large. 



Fig. 24. Arctomys wonax. 

 No. .445 Field Columbiao Museum Coll. ■; nat. size. 



135. monax. {.Vus), Linn. Syst. Nat., 1758, i, p. 60. 



/j/f' locality. Maryland. 



Geof^r. Distr. From New York to Georgia, west to the Dakotas, 

 intergrading in the Alleghanian and Canadian fauna- with next three 

 species. 



Gt-nl. Char. Bod>' robust, heavy; ears large ami rounded; tail 

 less than half the length of body, bushy. Color verging from almost 

 black to yellowish or whitish gray. 



Color. Crown and upper parts usually brownish black; nose 

 and chin gray; cheeks and throat yellowish white; under parts brown- 

 ish chestnut; feet black or dark brown. Tail black. 



.\fciuureni(nts. Total length, 484; tail vertebra,-. 114; hind 

 foot, 80. 



<i.—ifnnvit,s. {.4rctomys), Bangs, Proc. N. Eng. Zool. Club, 1899, p. 13. 

 Type locality. Black Bay, Labrador. 

 Geogr. Distr. Labrador, range unknown. 

 Genl. Char. Similar to A. mona.x, but colors darker. 



