REVISION OF THE JUMPING MICE OF THE GENUS ZAPUS. 37 



belong to this form. The type of abietorum is slightly larger than the 

 largest specimens examined of the typical form, while the ear is slightly 

 shorter than usual. 



Specimens examined. Total number, 4, from the following localities: 



Ontario: Peninsula Harbor, 1 (type). 

 Quebec: Godbout, 2; Lake Edward, 1. 



EOZAPUS 1 subgenus novum. 



Type Zapus setchuanus Pousargues, from Szechuen, China. 



Subgeneric characters. Teeth: i. |, p. J~J, m. || = 18. Skull similar 

 to those of the subgenera Zapus and Napceozapus, but differing as fol- 

 lows: Skull relatively broader, shorter, and lower; nasals broad, dis- 

 tinctly forked posteriorly; antorbital foramina rather large; incisive 

 foramina medium; posterior palatine foramina mid- 

 way between incisive foramina and postpalatal 

 notch, the latter barely reaching posterior plane 

 of molars. Rostrum relatively shorter and broader; 

 zygomata relatively shorter, with jugal portion 

 almost perfectly straight, frontal region less swol-Fi 

 len. Enamel pattern of molars somewhat similar, 

 but enamel folds not closely crowded; last lower Ta tsien-iou.Szechuen, 

 molar relatively larger (fig. 3). Color pattern differ- China> x 6> 

 ing from that of other subgenera in having a brown ventral stripe; tail 

 tipped with white, as in Napceozapus. 



ZAPUS (EOZAPUS) SETCHUANUS Pousargues. Szechuen Jumping Mouse. 



(PI. I, figs. 2, 2a.) 



Zapu* setcliuanus Pousargues, Ann. Sci. Nat., 8 e ser.. I, No. 4, p. 220, Avril, 1896; Bull. 

 Mus. d'Hist. Nat., Paris, II, p. 13, figs. 1-3, 1896. 



Type locality. Ta-tsieu-lou, Szechuen, China. 



Geographic distribution. Known only fi om the type locality. 



General characters. Differing from all other known members of the 

 genus in having a ventral stripe of brown. 



Color. Upper parts dark, tawny ochraceous; dorsal area sharply 

 defined and very thickly flecked with black-tipped hairs, the sides mod- 

 erately lined with same. Pattern of color above as in the American 

 species. Beneath white, suffused with ochraceous, the white nearly 

 obsolete on fore, breast; a brownish stripe about 5 mm. wide extends 

 the entire length of breast and belly; feet, chin, and lips white; tail 

 strongly bicolored; brownish above and whitish beneath, with about 

 15 mm. of the tip pure white; ears dusky. 



Cranial characters. Compared with 7i. hudsonius the skull of setchu- 

 anus differs as follows: In terorbital constriction relatively narrower j 



J Eozapus: ?}o:>s, dawn, 7. e. eastern; -\-Zapus. 



