NORTH DAKOTA: _Cass County_: Fargo, 1 (USBS). _Dickey County_: _Ludden_, 1 (USBS); Ellendale, 1 (USBS). _Kidder County_: _Pettibone_, 3 (Chic. AS). _La Moure County_: _La Moure_, 1 (USBS). _Oliver County_: Fort Clark, 3 (USBS). _Pembina County_: Pembina, 2 (USNM). _Ramsey County_: Devils Lake, 3 (USBS). _Ramson County_: _Lisbon_, 1 (USBS). _Richland County_: _Wahpeton_, 2 (USBS); _5 mi. NE Fairmont, Sioux River_, 5 (USBS); Blackner, 2 (USBS). _Rolette County_: Fish Lake, 2 (USBS). _Sioux County_: Cannon Ball, 4 (USBS). _Williams Co._: Grinnell, 2 (USBS).
WISCONSIN: _Burnett County_: Danbury, 1 (USBS). _Chippewa County_: _Holcombe_, 3 (USBS). _Clark County_: _Withee_, 4 (USBS); _Worden Township_, 2 (USBS). _Crawford County_: Lynxville, 1 (USBS). _Dane Co._: _Madison_, 2 (OHIO). _Dodge Co._: _Horicorn Refuge_, 2 (USBS). _Juneau County_: _Mather_, 1 (USBS). _Marathon Co._: _Rib Hill_, 8 (USBS). _Oconto County_: Lakewood, 1 (USBS). _Portage County_: Stevens Point, 3 (USBS). _Price County_: Ogema, 2 (USBS). _Rock County_: Milton, 1 (USBS). _Sauk County_: _Devils Lake_, 1 (USBS). _Sheboygan County_: 8 mi. SW Mellen, 1 (USBS); _Elkhart Lake_, 1 (USBS). _Walworth County_: _Delavan, Fosters Bridge_, 1 (USBS); _Turtle Lake_, 1 (USBS). _Wood Co._: _Thorp Township_, 2 (AMNH); _Hewett Township_, 4 (AMNH).
_Marginal records._--North Dakota: Fish Lake; Pembina. Wisconsin: Danbury; Ogema; Lakewood. Illinois: Fox Lake. Indiana: La Fayette; New Harmony. Illinois: 6 mi. S Pinckneyville (near Pyatt). Iowa: Ames; Arthur; Ireton. Montana: Yellowstone River, 7 mi. NE Glendive, 2000 ft. North Dakota: Grinnell.
_Zapus hudsonius ladas_ Bangs, Proc. New England Zool. Club, 1:10, February 28, 1899.
_Type._--Female, adult, skin and skull, No. 4169, E. A. and O. Bangs Coll. (now in Mus. Comp. Zool.); Rigoulette, Hamilton Inlet, Labrador; obtained on July 18, 1895, by C. H. Goldthwaite.
_Range._--Eastern Quebec north of Gulf of St. Lawrence, Labrador, and Newfoundland. See fig. 47. Zonal range: Canadian and Hudsonian.
_Description._--Size medium; back relatively dark, near Ochraceous-Tawny with admixture of black-tipped hair; dorsal band relatively wide but not sharply defined against color of sides; side lighter than back, from near Ochraceous-Tawny to near Cinnamon and lined with black-tipped hair; lateral line distinct of clear Cinnamon-Buff or Light Ochraceous-Buff; underparts white, often suffused with Ochraceous-Buff; tail distinctly bicolored, dark brown to black above and yellowish-white to grayish-white below; ears dark, usually flecked with Tawny Ochraceous and edged with ochraceous; feet grayish-white above; incisive foramina relatively short and broad; pterygoid fossae relatively broad; auditory bullae broad and well inflated; mastoid region relatively broad; zygomata relatively short; inferior arm of zygomatic process of maxillary relatively broad.