FIELD BOOK OF MAMMALS 



base of whiskers, nor along lateral line; ears colored like rest 

 of upperparts; tail faintly bicolored, dusky above, smoke- 

 gray beiow; underparts smoke-gray, with tinge of buffy. 

 Total length, 3.5-4.4 inches; tail vertebrae, 1.4-1.8 inches; 

 hind foot, .54-.60 inch; ear from notch (in dry specimens), 

 .35-.40 inch. Found in "Southern Texas from the vicinity 

 of Matagorda Bay westward to Bexar County and thence 

 south to the Rio Grande; . . . Lower Sonoran Zone." 

 (Osgood) 

 Dark Baiomys. — Baiomys taylori suhater (Bailey). 



Darker than typical taylori. Upperparts, in general tone, 

 varying from dark grayish brown or pale reddish sepia to 

 almost black (in mid-dorsal region) ; sides more buffy ; 

 underparts buffy, paler and grayer on throat. Total length, 

 3.5-4.2 inches; tail vertebrae, 1.5-1.8 inches; hind foot, 

 .56-.60 inch; ear from notch (in dry specimens), .32-.38 

 inch. Found in "Coast region of southeastern Texas from 

 the vicinity of Matagorda Bay eastward. Austroriparian 

 Zone." (Osgood) 



In general, the habits of Baiomys are probably those of 

 Peromyscus. These tiny Mice live in weeds and brush or 

 in open fields and meadows, and make small round holes. 

 Although fairly common in some places, the members of the 

 genus Baiomys have a very limited distribution in the United 

 States, and not very much has been written on their life- 

 histories. They make nests in their burrows and also have 

 cavities below ground for the storage of food. In grassy 

 localities they make surface runways very like those of 

 Meadow Mice. 



The number of young in a litter is small, two or three. 



Genus Peromyscus^ 



Dentition: Incisors, \; Canines, %; Premolars, g ; Molars, | = 16. 



White-footed Mouse. — Peromyscus maniculatus 



and related forms 



Names. — White-footed Mouse; Deer Mouse; Vesper Mouse; 

 Wood Mouse. Plates XXIX and XXX. 



General Description. — A Mouse of medium size; tail long, 

 about half of total length, rather well haired, with scaly 



^ For a very full and complete revision of this genus see Wilfred H. 

 Osgood, North American Fauna, No. 28, 1900. 



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