240 Description of a new Subspecies [ March, 
The nape and the back between the median and first lateral 
black stripes are clear ash-gray in the Northern animal, while in 
the Southern these parts are dark iron-gray, more or less mixed 
with grizzly. In specimens from the Mississippi Valley, the same 
parts show a sprinkling of yellow-tipped hairs. 
The light lateral stripes are white, or but faintly tinged with 
buff in typical Northern specimens, while in typical striatus from 
the South they are strongly washed with buff, which color often 
deepens to pale fulvous posteriorly, and is further obscured by 
the admixture of a number of dark-tipped hairs. The sides vary 
from the palest buff (as in specimen No. 1200) or buffy fulvous in 
the Northern to dark fulvous in the Southern form. Northern 
specimens show a slight sprinkling of black-tipped hairs, which 
increase in number from the north southward till in typical 
striatus the admixture of these hairs very materially darkens the 
sides of the animal. In typical Northern examples, the pale 
buff of the sides fades so gradually into the white of the belly 
that no sharp line can be drawn between them; while in typical 
striatus, on the contrary, a very clear line of demarkation sepa- ` 
rates the two, the (comparatively) dark sides contrasting strongly 
with the buffy-white of the under parts, even when these parts are 
suffused with fulvous—which fact is due to the absence of black- 
tipped hairs from the belly. 
The upper side of the tail is much lighter in Northern speci- 
mens than in s¢riatus proper, though the hoary edging is more 
conspicuous in the Southern. This difference in appearance is 
due to the fact that the black subapical portion of each hair is 
much broader in the latter than in the former, and the subbasal 
fulvous portion proportionately narrower. The result is that in 
the Northern animal the pale fulvous zone shows through, while 
in the Southern the corresponding zone is mostly concealed by 
the overlying black. In typical Northern specimens the under 
side of the tail is buffy or buffy-fulvous, fading in the anal region - 
into the white of the belly; while in typical striatus the under 
side of the tail is deep hazel, which color extends forward around 
the anus to the genitals, where it ends abruptly without shading 
_ off into the surrounding parts. 
_ The dark spot above the tip of the nose is usually indistinct - 
and sometimes wanting in Northern specimens, while as a rule it 
is well marked in those from the South. The facial markings, 0% 
