I06 NEW YORK STATE MUSEUM 



far to the westward. It is often erroneously called " mole " or " meadow 

 mole". In the extensive territory which it inhabits the animal is differ- 

 entiated into several geographic races, four of which occur within our 

 limits. 



SUBSPECIES OF MICROTUS PENNSYIiVANICCS ■ 



Size large, total length of adult 



males often over 185 (7i) M. pennBylvanious pennsylvanicus 



Size medium or small, total length 

 of adult males seldom if ever 

 reaching 175 (6b) 

 Total leugth of adults mostly 



under 140 (5i) M. i^en nsyl van ieus labradorius 



Total length of adults mostly 



over 140 (5i) 



General color clear light 



brown M. ijcnnsy 1 vanicus fontigenus 



General color brown tinged 



with russet M. pennsylvanicus acadicus 



Microtus pennsylvanicus pennsylvanicus (Ord) Comnton eastern 



field mouse 

 1815 Mus peunsylvanica Ord, Guthrie's geography. Am. ed. 2. 2: 292. 



(Near Philadelphia Pa.) 

 1895 [Microtus] pennsylvanicus Rhoads, American naturalist. Oct. 



1895. 24: 940 

 1900 Microtus pennsylvanicus Bailey, North American fauna. 6 



June 1900. no. 17, p. 16. 

 General color above dark brown, usually tinged with tawny, under parts light 

 gray often washed with huffy; skull rather narrow; fur not specially fine and 

 soft. Total length, 180 (6i) ; tail vertebrae, 50 (2) ; bind foot, 21 (113) 



The common eastern meadow mouse is abundant in fields and 

 marshes throughout the eastern United States and southern Canada 

 from well within the Canadian zone to the lower edge of the upper 

 austral zone. 



Microtus pennsylvanicus labradorius Bailey Labrador field mouse 



1898 Microtus penusylvanicus labradorius Bailey, Proo. biolog. 



800. Washington. 30 Ap. 1898. 12: 88. (Fort Chimo, Ungava, Labrador) 



1900 Microtus pennsylvanicus labradorius, Bailey, North 



American fauna. 6 June 1900. no. 17, p. 22. 



Dark brown above, whitish below ; skull not very narrow. Total length, 138 



'ol); tail vertebrae, 38 (11); hind foot, 19 (f;. (Iabrad6rius; N. Lat., 



Labradorean) 



The Labrador field mouse inhabits the barrens of northern Labrador. 



