196 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
2 ARVICOLA RIPARIUS var. BOREALIS, Rich. 
Little Northern Meadow Mouse. 
Arvicola borealis, RICHARDSON, Zool. Journ. 1828, 517; Fn. Bor.-Am. i, 1829, 127.—Aup. & Bacu., Q. N. A- 
iii, 1858, 184, pl. 129 (from Richardson).—Barnrp, M. N, A. 1857, 549 (from the same). 
“ Hypudaus borealis, WAGNER, Suppl. Schreber, iii, 1843, 593” (the same). 
Arvicola (riparius var.?) borcalis, CouES, Proc, Acad. Nat. Sci. Phila. 1874, 190. 
Diacnosis.—A. ripario simillimus, sed minor, artubus brevioribus, hirsuti- 
oribus, vellere lanuginosiore. 
Averaging a little smaller than true riparius (three or four inches long), 
with smaller and hairier ears, tail, and feet. . 
Hasirar.—Northwestern America. 
TaBLE XLIX.— Measurements of thirty-one small Arctic ARVICOLAZ of the RIPARIUS type, supposed to repre- 
sent a variety BOREALIS, Lich. 
N. B.—They connect directly with specimens of the preceding enumeration. 
apes Tail to end 
of— 
Pay Locality. Collector. S 7 > 3S Remarks. 
2 | = a wey = 5 = s 
A & R ° BH > eo] ie q & 
9181 | Liverpool Bay ..---.---- R. McKarlane:.-. |------|--==--|-=---- 3.60 | 1.10 | 1.50 | 0.33 | 0.69 |.-...- Dry. 
*9139 . 32 . do, 
8033 --do. 
8047 22200: 
9138 -..do. 
9204 als near Qs 
9137 ok 4 u I s ; Ha Grseaie| beso do. 
9140 mar ilos 
6874 - 4 e=edos 
9107 C L i : bis WEN esse sollee do. 
9179 .. do, 
8165 -- do. 
9235 eto 
9177 ---do. 
9190 ---do, 
6265 s=.do; 
6860 ee do: \ 
6868 Fresh 
6863 Dry. 
6862 Fresh 
6869 Dry. 
6854 ==. 00. 
6356 Fresh 
6852 Dry. 
6871 Fresh 
16248 ----do. 
6879 
6877 
6853 Young. 
6854 Dry. 
8752 
* Taken in winter, and apparently adult. Its length cannot now be ascertained with accuracy ; but it is a tiny animal, 
apparently falling short of 3 inches. 
+Contained 7 fetus. This and the others measured fresh do not appear to be so much larger than the rest as the figures 
would indicate. 
