M4MMAI^ OF PpjNSy)-V4tfIA AOT) NSW JERSEY, 9| 



re^spo^ble tP pxfend ^hejr habitat northward and f a?twa?(} in Nt ],> jn ppn? 

 fprqaity to the distribmio^ pf Ck(fm0fy/<frff swapjips, tljrpugb eastern Mpn^ 

 tnouth and Middlesex to Hudson Cq, At what point they may be said to 

 iptergra(}e with gctpptri we havie not th§ tnaterial to phow, bqt the Pjpe Pftys 

 ren regions south of ^ppijiouth Co, are probably their most natural limit, 



Hc^bits, f#f.-r-What has already been written regarding Gapper's wopd volf 

 will apply largely tp the h^bit? of this race. The (cedar swanip vole, boweverj 

 living as it does in a fannal region where the hot climate and vegetation of 

 the uplands ipamedijitely adjoining thg swamps it frequents is injurions to so 

 boreal an anipial, keeps very close to the damp, copl interipr and boggy mar- 

 gins of the swamp wher^ the sphagnum is always dense and moist or the 

 cedar hummocks crowd closely together, Such an enyirppm^nt, permitting 

 no incursions into the sunnier uplands ^nd requiring close contact with the 

 subterranean springs which make life bearable in summer in such austral sur^ 

 roundings, has probably been the cause of the darker coloration of this vple, 

 as compared with Gapper's vple pf the north woods. From remarks made in 

 the original descriptions of it, there seems to be an idea that the cedar swamp 

 race is partial to cranberry bogs, This is not the case, they rarely venturing 

 into the edges of the PP^n bogs farther than the line of bushes which fringes 

 the borders of the cedar swamp, In the open bogs they are replaced by the 

 meadow mouse, Microtus penn^ylvanicus. 



Description of species : Gapper's wood vole is bright chestnut on the back, 

 sprinkled lightly with blackish hairs ; sides grayish-buffy ochraceous ; belly 

 gray, washed with pale buff, the" lateral line separating the upper and lower 

 colors not defined, the grayish-buff reaching far up the sides, restricting the 

 chestnut dorsal area to a sort of broad sfripe; feet above, grayish-white. 

 Ears showing above body fur. The New Jersey wood vole is dark chestnut 

 above, thickly raipgled with blackish hairs over back, head and sides, under- 

 parts as in gapperi, hind feet dusky gray, upper body colors reaching down 

 sides and definitely separated along the ground line frpra whitish of under 

 parts. 



G. S. Miller, Jr., in his key to Land Mammals of N. Amer., 1900, p. m, 

 separates these two forms as distinct species on a basis of the cranial charagr 

 ters and of the size of the ears and sharp definition between upper and lowf r 

 body-colors, I have taken a large series of adult Evofomys from, 1, southern 

 N. J., 2, northern N. J., 3, North Mountain, Pa., 4, Quebec, and 6, southern 

 Pa. and W. Va., and compared them with the following results : i, there is 

 practically no difference in average measurements in the four series, the sige 

 and character of ear not being diagnostic ; 2, the color differences are not 

 sufficient of themselves to admit of more than racial separation ; 3, the cranial 

 characters (" skull and teeth much heavier than in E. gqpperi, in this respect 

 resembling E. carolinensis") appear to show constant difference in respect 



