Fes., 1912. MammMatrs or ILLiInois AND Wisconsin— Cory. 217 
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Microtus p. acadicus 
Microtus p. fontigenus 
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_ Cc. si Microtus nesophilus 
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Microtus shattucki 
Microtus 
lerraenovae 
. Area of intergradation| 
Map illustrating approximate range of the Meadow Mouse (Microtus pennsylvanicus), 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 Ruoaps. (Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 307.) 
Type locality — Currituck, North Carolina. Slightly larger and darker than 
pennsylvanicus; hind feet larger. 
Microtus p. acadicus BANGS. (Amer. Nat., XX XI, 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; bull large. 
Microtus drummondi (Aup. & Bacu.). (Quadrupeds of N. Amer., ITI, 1854, p. 166.) 
Type locality — Vicinity of Jasper House, Alberta, Canada. Paler, smaller 
and more slender than pennsylvanicus. 
Microtus terrenove (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 breweri (BAIRD). (Mammals N. Amer., 1857, p. 525.) Type locality —~ 
Muskeget Island, Massachusetts. Paler and grayer than pennsylvanicus; size 
somewhat larger. 
Microtus nesophilus Battzy. (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, rg01, p. 201.) Type 
locality — Tumble Down Dick Island, Dark Harbor, Penobscot Bay, Maine. 
Similar in color to pennsylvanicus but larger. 
