bce 28 BANGS — LABRADOR MAMMALS 13 
1899 
presented by any large series of any vole. <A few specimens are 
lighter brown above than usual,— JZ. enzxus being a dark colored 
species, — and some few have buffy under parts,— in one instance 
nearly fawn color. JZ. entxus can always be distinguished by its 
weak molars, long, narrow, straight rostrum, and projecting upper 
incisors, 
There is no approach whatever shown in this series to the 
Newfoundland vole, JZ. terrenove, the Black Bay specimens being 
in every way extreme JV. enzxus. 
Microtus chrotorrhinus ravus Bangs. 
Seventeen specimens taken in July, August, and September, 
including both adults and young. 
Evotomys proteus Bangs. 
Twenty-seven specimens, taken in July, August, September and 
October. These specimens are about the same as Hamilton Inlet 
ones. The ear of the Black Bay animal appears to be a little 
smaller, and there is a greater preponderance of red-backed indi- 
viduals in the series — thirteen red-backed and fourteen brown- 
backed ones. 
Arctomys ignavus' sp. nov. 
Six specimens, five adults, of both sexes, and one young. 
Type, from Black Bay, Labrador, no. 7971, Bh , middle-aged adult, coll. of 
E. A. and O. Bangs. Collected July 13, 1898, by Ernest Doane. 
General characters.— Size rather smaller than 4A. monax. Colors darker 
and browner, less reddish and yellowish. Skull very different, short, and 
wide, developing a strong sagittal crest with age; rostrum short and heavy; 
nasals short and very wide; molar teeth large; incisors white; outer faces of 
both upper and under incisors roughened by numerous small parallel grooves 
as in A. pruinosus. 
Color.— The type, upper parts: hairs blackish slate at base, then burnt 
umber, and tipped with light yellowish brown. The median brown band of 
the hairs is much darker, and the light brown tips are shorter, than in 
1 /gnavus — inactive, lazy, immovable. 
