FIELD BOOK OF MAMMALS 



parts creamy white. Total length, 6.2-7.5 inches; tail 

 vertebrae, 2.9-3.3 inches; hind foot, .8-. 88 inch. Found in 

 "Upper Austral and Transition Zones of the eastern United 

 States and Canada. Extending from Nova Scotia to cen- 

 tral Minnesota, thence south through the humid parts of 

 eastern Nebraska and Kansas and eastward to the Atlantic 

 coast, following quite closely the boundary between the 

 Lower and Upper Austral Zones on the south and that be- 

 tween the Transition and Canadian on the north." (Os- 

 good) 



Monomoy Island White-footed Mouse. — Peromyscns leucopus 

 ammodytes Bangs. 

 Resembling novehoracensis , but paler above and with hair 

 of underparts white to roots. Upperparts fawn, paler on 

 sides; tail pale brownish above, white below; underparts 

 clear white with creamy tinge, hairs white to base over 

 median area and sometimes almost up to lower sides. 

 Total length, 6.5-7.6 inches; tail vertebrae, 2.8—3.5 inches; 

 hind foot, .8-. 84 inch. Found only on Monomoy Island, 

 off the coast of Massachusetts, southeast of the Cape Cod 

 Peninsula. 



Marthas Vineyard Island White-footed Mouse. — Peromyscus 

 leucopus fusus Bangs. 

 Larger than novehoracensis, but otherwise resembling it. 

 Total length, 7.6-8.1 inches; tail vertebras, 3.4-3.8 inches; 

 hind foot, .86-.94 inch. Found only on the Island of 

 Marthas Vineyard, off the south coast of Massachusetts. 



Badlands White-footed Mouse. — Peromyscus leucopus aridu- 

 lus Osgood. 

 Larger and paler than novehoracensis. Upperparts ochrace- 

 ous buff, lightly sprinkled with dusky ; dorsal area very little 

 darker than sides; underparts creamy white. Total length, 

 6.4-8.2 inches; tail vertebrae, 2.5-3.7 inches; hind foot, .84- 

 .92 inch. Found in "Upper Sonoran Zone of eastern Mon- 

 tana and Wyoming and the adjoining western parts of 

 South Dakota and Nebraska; probably south to Oklahoma 

 and west to eastern Colorado." (Osgood) 



Buffy White-footed Mouse. — Peromyscus leucopus ochraceus 

 Osgood. 

 Upperparts bright ochraceous buff, lightly mixed with 

 dusky, slightly darker on dorsal region than on sides, but 

 without a defined dorsal band; tail dusky brownish above, 

 white tinged with buffy below; ochraceous buff or buffy 

 tinge on the white of underparts, feet, and hands. Total 

 length, 6.9-7.2 inches; tail vertebras, 3.3 inches; hind foot, 

 .9 inch. Found in eastern and central Arizona. 



Tomillo Mouse. — Peromyscus leucopus tornillo (Meams). 

 Resembling ochraceus and aridulus, but paler, fawn-colored 

 instead of ochraceous. Upperparts fawn, finely lined with 

 dusky; tail indistinctly bicolor, pale brownish and white; 

 underparts clear creamy white. Total length, 6.8-8.1 



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