MEADOW MOUSE 



below; underparts clear gray, whitish along middle of 

 belly and between arms. Total length, 7 inches; tail 

 vertebrae, 2 inches; hind foot, .88 inch. Found only on 

 Block Island, Newport County, Rhode Island. 



Drummond Meadow Mouse. — Microtus drummondi (Audubon 

 and Bachman). 

 Smaller than typical pennsylvanicus, paler in color. Upper- 

 parts (summer) yellowish bister sprinkled with dark brown 

 or black-tipped hairs; more yellowish on sides of nose and 

 in front of ears; feet silvery gray; tail bicolor, blackish and 

 whitish; underparts white, sometimes washed with buffy. 

 Winter pelage paler, yellower on ears and nose. Total 

 length, 5.9 inches; tail vertebrae, 1.6 inches; hind foot, .72 

 inch. Found "From Hudson Bay to the west slope of 

 the Rocky Mountains and Alaska, and from the northern 

 edge of the United States north to Fort Anderson, N.W.T., 

 in Canadian and Hudsonian Zones." (Bailey) 



Admiralty Island Meadow Mouse. — Microtus admiraltia 

 Heller. 

 Resembling drummondi but grayer. ' ' Upperparts grizzled 

 grayish brown, the brown predominating; sides somewhat 

 paler and grayer but changing rather abruptly to the light 

 grayish wash of the underparts. Feet grayish. Tail well 

 haired , sharply bicolor, dusky brown above, whitish below. ' ' 

 (Heller) Total length, 6.2 inches; tail vertebras, 1.8 inches ; 

 hind foot, .84 inch. Found only on Admiralty Island, 

 Alaska. 



Barren Ground Meadow Mouse. — Microtus aphorodemus 

 _ Preble. 

 Similar to drummondi but larger. Upperparts dark 

 yellowish brown sprinkled with yellow- tipped hairs; under- 

 parts whitish to grayish, sometimes with wash of light 

 brown. Total length, 7.6 inches; tail vertebrae, 2 inches; 

 hind foot, .8 inch. Found on the Barren Grounds of Kee- 

 watin from the vicinity of Cape Churchill (west coast of 

 Hudson Bay) northward; limits of range unknown. 



Aztec Meadow Mouse. — Microtus aztecus (Allen). 



Resembling typical pennsylvaniciis in size, .but tail shorter 

 and foot larger. Upperparts (winter) dull buffy sprinkled 

 with many black hairs; feet slate- colored; tail sharply 

 bicolor, black and soiled white; underparts washed with 

 creamy or pale buff. Total length, 6.9 inches; tail verte- 

 bras, 1.7 inches; hind foot, .88 inch. Found in "Valley of 

 the San Juan River in northwestern New Mexico, in 

 Transition Zone." (Bailey) 



Large Labrador Meadow Mouse. — Microtus enixus Bangs. 

 Large and darker than typical pennsylvanicus. Upper- 

 parts (summer) mixed dark yellowish bister and blackish; 

 feet dusky; tail above, black, below, grayish brown; under- 

 parts ashy, occasionally with buffy wash. Total length, 

 7.6 inches; tail vertebrae, 2.7 inches; hind foot, .9 inch. 



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