REVISION OF THE JUMPING MICE OF THE GENUS ZAPUS. 33 



NAP^EOZAPUS 1 subgenus novum. 



Type Zapus insignia Miller, from Restigouche River, New Brunswick. 



Subgcneric characters. Teeth: i. ^ p. ^, m. |J= 16. Skull stouter 

 than in other subgenera; interorbital constriction 

 greater; frontal region more swollen ; middle molars 

 equaling first in size. Enamel pattern of molars 

 not essentially different from Zapus, but sulcus on 

 inner side of upper molars deeper and persisting 

 longer in the wearing tooth (fig. 2). General color FIQ 2 _ Mo]ar ^^ of Za _ 

 pattern as usual in the genus, bat tail tipped with PUS (Napceozapus) tnsig. 



w ],jf e nis (topotype), from 



Restigouche River, N. B. 

 (No. 2333, coll. E. A. and 

 O. Bangs) X 6. 

 KEY TO SPECIES OF THE SUBGENUS NAPJEOZAPUS. 



Hind foot less than 33 mm. ; interorbital constriction usually more than 4.5 mm. 



Larger and lighter in color; hind foot usually more than 30 mm. ; skull broader 



and stouter insignis. 



Smaller and darker; hind foot about 30 mm. or less; skull rather slender. 



roanensis. 



Mind foot about 33 mm. ; iuterorbital constriction narrow, usually less than 4.5 mm. ; 

 size large abietorum. 



ZAPUS (NAPCEOZAPUS) INSIGNIS Miller. Woodland Jumping Mouse. 

 (PL I, figs l. la.) 



1856. Meriones labradorlus Dawson, Edinburgh New Philos. Journ., new aer., Ill, p. 2. 



1857. Jaculus httdsonius Baird, Mamm. N. Am., p. 430 (in part specimen from Nova 

 Scotia). 



1877. Zapus hudsonius Coues, Mon. N. Am. Rodentia, p. 467 (in part 1 ). 

 1891. Zapus insignis Miller, Am. Naturalist, XXV, p. 472, August, 1891. 



Type locality. Kestigouche River, New Brunswick. 



Geographic distribution. Canadian Zone in eastern Canada and south 

 to western Maryland. 



General characters. Size rather large, larger than Zapus hudsonius, 

 with longer ears and paler, more fulvous coloration. Tail tipped with 

 white. 



Color. "Adult male No. Iff f, collection of G-. S. Miller, jr., Peterboro, 

 N. Y., August 22, 1892; length, 250; tail vertebra, 154; hind foot, 31.6; 

 ear from notch, 18.6. Tip of tail for 23 mm., dorsum of manus and pes, 

 and entire ventral surface pure white to base of hairs. Sides buff-yellow, 

 tinged with clay color, except on cheeks, fore neck, and a narrow line 

 bordering white of belly, where the yellow is noticeably purer; the fur 

 plumbeous- gray at base and a trifle sprinkled with black, bristly hairs. 

 These black hairs predominate on the back, where they form a sharply 



1 Xapwozaptts : raTtato?, belonging to a wooded vale or dell; -f- Zapus. This name 

 was suggested to me by Mr. Gen-it S. Miller, jr. 



