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 PENNSYIiVANICUS 



Size large, total length of adult 



males often over 185 (71) M. pennsylvanicus pennsylvanicus 



Size medium or small, totallength 

 of adult m.ales seldom if ever 

 reachiug 175 (61) 

 Total leugth of adults mostly 



under 140 (5|) M. pennsylvanicus labradorius 



Total length of adults mostly 



over 140 (5^) 



General color clear light 



brown M. pennsylvanicus fontigenus 



General color brown tinged 



with russet M. pennsylvanicus acadicus 



Micro tus pennsylvanicus pennsylvanicus (Ord) Common eastern 



field 7nouse 



1815 Mus pennsylvanica 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 bnffy; skull rather narrow; fur not specially fine and 

 soft. Total length, 180 (6|) ; tail vertebrae, 50 (2) ; hind foot, 21 (lit) 



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 pennsylvanicus labradorius Bailey, Proc. biolog. 



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



1900 Microtus pennsylvanicus labradorius, Bailey, North 



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



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



'5J); tail vertebrae, 38 (l^); hind foot, 19 (f). (labradorius^ N. Lat., 



Labradorean) 



The Labrador field mouse inhabits the barrens of northern Labrador. 



