Feb., 1912. Mammals of Illinois and Wisconsin — Cory. 217 



,s drummondi 







Microtus brewer! 



© 



Microtus nesophiius 



© 



Microtus shattucki 



© 



Vicrotus terraenovae 



of intergradafion 



Map illustrating approximate range of the Meadow Mouse (Microtus penyisylvanicus) , together 

 with the type localities of the species and subspecies belonging to the genus. 



Microtus pennsylvanicus (Ord). Type locality — Meadows below Philadelphia, 



Pennsylvania. Description as previously given. 

 Microtus p. nigrans Rhoads. (Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 307.) 



Type locality — Currituck, North Carolina. Slightly larger and darker than 



pen?isylvanicus; hind feet larger. 

 Microtus p. acadicus Bangs. (Amer. Nat., XXXI, 1897, p. 239.) Type locality — • 



Digby, Nova Scotia. Smaller than pennsylvanicus and somewhat paler. 

 Microtus p. fontigenus (Bangs). (Proc. Biol. Soc. Wash., X, 1896, p. 48.) Type 



locality — Lake Edward, Quebec. Smaller than pennsylvanicus, with skull 



shorter and wider; buUas large. 

 Microtus drummondi (Aud. & Bach.). (Quadrupeds of N. Amer., Ill, 1854, p. 166.) 



Type locality — Vicinity of Jasper House, Alberta, Canada. Paler, smaller 



and more slender than pennsylvanicus. 

 Microtus terrcenovcB (Bangs). (Proc. Biol. Soc. Wash., IX, 1894, p. 129.) Type 



locality — Codroy, Newfoundland. Slightly larger than pennsylvanicus, with 



larger hind feet; color more yellowish; a median line on belly. 

 Microtus hreweri (Baird). (Mammals N. Amer., 1857, p. 525.) Type locality^ 



Muskeget Island, Massachusetts. Paler and grayer than pennsylvanicus; size 



somewhat larger. 

 Microtus nesophiius Bailey. (Science, N. Ser., VIII, 1898, p. 783.) Type locality — 



Great Gull Island, New York. Darker than pennsylvanicus; skull shorter and 



wider. 

 Microtus shattucki (Howe). (Proc. Port. Soc. Nat. Hist., II, 1901, p. 201.) Type 



locality — Tumble Down Dick Island, Dark Harbor, Penobscot Bay, Maine. 



Similar in color to pennsylvanicus but larger. 



