KEY to LAND MAMMALS OF NORTHEASTERN NORTH AMERICA tl3 



Zapus hudsonius hudsonius (Zimmermann) Northern meadow 



jumping mouse 



1780Dipu8 hudsonius Zimmermani] , Geogr. Gesch. 2:358. (Hudson 



bay) 

 1873 Zapus hudsonius Coues, Bull. U. S. geolog. surv. terr. ser. 2. no. 5, 



p. 254. 

 1899 Zapus hudsonius Preble, North American fauna. 8 Aug. 1899. no. 



15, p. 15. 



Back yellowish brown ; sides light grayish buff', slightly sprinkled with black. 

 Total length, 220 (8i) ; tail vertebrae, 130 (5i) ; hind foot, 31 (1t%). (hud- 

 sonius; N. Lat., Hudsonian) ^ 



The northern meadow jumping mouse occurs throughout the Cana- 

 dian zone and lower part of the Hudsonian zone of eastern North Amer- 

 ica except in the area occupied by the following form. 



Zapus hudsonius ladas Bangs Labrador meadow jumping mouse 



1899 Zapus hudsonius ladas Bangs, Proc. New England zool. club. 



28 Feb. 1899. 1 : 10. (Hamilton inlet, Labrador) 

 1899 Zapus hudsonius ladas Preble, North American fauna. 8 Aug. 



1899. no. 15, p. 17. 



Back blackish ; sides tawny ochraceoiis, conspicuously sprinkled with black. 

 Total length, 230 (9^) ; tail vertebrae, 145 (5f ) ; hind foot, 32 (l^r). (Iddas; 

 from name of a famous runner of Alexander the Great) 



The Labrador meadow jumping mouse is at present known from 

 eastern Labrador only. 



Genus Napaeozapus Preble 



1899 Napaeozapus Preble, North American fauna. 8 Aug. 1899. no. 15, p. 33. 

 Type Zapus insignis Miller. 

 Teeffe 16; otherwise as in Zapus. (Nap ae o z ap us; Gk., woodland Zapus) 



The genus Napaeozapus is peculiar to eastern North America, 

 where it is represented by one species only. 



Napaeozapus insignis Miller Woodland jumping mouse 



Back and sides yellowish brown, the former heavily, the latter scarcely, 

 sprinkled with black; belly always pure white; tail tipped with white, (in- 

 signis; Lat., distinguished) 



The woodland jumping mouse is abundant in heavy woods (chiefly 

 near watercourses) throughout the Hudsonian and Canadian zones of 

 eastern North America. It also occurs sparingly in isolated cool lo- 

 calities in the upper edge of the transition zone. It is divisible into three 

 races. 



