FIELD BOOK OF MAMMALS 



Acadian Mouse.— Mi era ius pennsylvanicus acadicus Bangs. 

 Smaller and paler than typical pennsylvanicus. Upper- 

 parts (summer) yellowish bister sprinkled with black; tail 

 indistinctly bicolor, above dusky, below slightly lighter; 

 underparts ashy. Winter pelage. — Buffy gray above, 

 belly washed with pure white; tail sharply bicolor, blackish 

 and white. Total length, 6.8 inches; tail vertebrae, 1.9 

 inches; hind foot, .84 inch. Found in "Nova Scotia and 

 Prince Edward Island." (Bailey) 



Sawatch Meadow Mouse. — Microtus pennsylvanicus modestus 

 (Baird). 

 Resembling typical pennsylvanicus in size but more yellow 

 in color. Upperparts (summer) dull ochraceous, sprinkled 

 with black; tail faintly bicolor, blackish and dull grayish; 

 feet slaty; underparts soiled whitish to ashy or cinnamon. 

 Winter pelage with many black hairs along upperparts; 

 underparts with wash of creamy white; tail more distinctly 

 bicolor than in summer. Total length, 7 inches; tail 

 vertebrae, 1.8 inches; hind foot, .82 inch. Found in "Rocky 

 Mountains and western Plains from New Mexico to British 

 Columbia, and from the Black Hills of South Dakota to 

 central Idaho, and beyond, with slight variation, to the 

 plains of the Columbia, mainly in Transition Zone." 

 (Bailey) 



Badland Meadow Mouse; Bean Mouse. — Microtus pennsyl- 

 vanicus wahema Bailey. 

 Paler than typical pennsylvanicus and slightly smaller. 

 Upperparts buffy, sides grayer; underparts pale gray. 

 Total length, 7.1 inches; tail vertebrae, 1.7 inches; hind 

 foot, .8 inch. Found in the Badlands section of the 

 Missouri River valley and westward over southwestern 

 North Dakota and eastern Montana. 



Forest Meadow Mouse. — Microtus pennsylvanicus fontigenus 

 (Bangs). 

 Smaller than typical perinsylvanicus. Upperparts (autumn) 

 dark bister mixed with black, darker on back than sides; 

 feet slaty; tail bicolor, blackish and grayish; underparts 

 washed with whitish or ashy. Total length, 6 inches; tail 

 vertebrae, 1.8 inches; hind-foot, .84 inch. Found in 

 "Eastern Canada, in the Hudsonian Zone." (Bailey) 



Little Labrador Meadow Mouse. — Microtus pennsylvanicus 

 labradorius Bailey. 

 "Color. — (Much changed by alcohol.) Upperparts dark 

 brownish; belly whitish; tail bicolor; feet pale." (Bailey) 

 Total length, 5.6 inches; tail vertebrae, 1.6 inches; hind 

 foot, .8 inch. Known only from Fort Chimo, Ungava, 

 Laborador. 



Block Island Meadow Mouse. — Microtus provectus Bangs. 

 Resembling typical pennsylvanicus but larger, underparts 

 always gray. Upperparts yellowish brown mixed with 

 dark brown; tail indistinctly bicolor, dusky above, grayish 



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