1910 | Taylor—Two New Rodents from Nevada. 285 
hazel brown coming ‘into prominence on the nose. This grizzled 
area narrowest just back of the ears, posteriorly becoming 
broader and extending over the rump and upper surface of the 
thighs, also on to the dorsal surface of the tail for a quarter 
of the distance to the end. Ends of hairs of under-parts 
(throat, pectoral region, and abdomen) practically pure white, 
their plumbeous proximal portions showing through to some 
extent. Sides (just below the outermost black stripe) white 
with a faint suggestion of brown. 
The color of the sides grading anteriorly into the ochraceous 
clay of the shoulders, ventrally into the white of the under- 
parts and posteriorly into the grizzled black, white, and ochra- 
ceous of the rump. Fore legs dorsally light ochraceous, becoming 
white on the fingers, and ventrally pure white. Hind legs dor- 
sally like back, except that there is a shehtly more hazel tinge. 
There are two kinds of hairs on the upper surface of the hind 
legs, one a long stiff type, gray basally, black in its middle por- 
tion and white for three or four millimeters distally, the other a 
short soft type, its inner half plumbeous, its outer half hazel. 
Feet white with a suggestion of very light ochraceous. Lower 
surface of thighs pure white, the hairs of this region lacking 
the plumbeous bases. Ventral surface of tail anteriorly ochra- 
ceous, becoming gradually more tawny ochraceous toward the 
end. Lateral black stripe of tail (viewed ventrally) three to 
six millimeters broad. Dorsally (distal three-fourths) the tail 
is black, sprinkled with a few light ochraceous hairs. Tail 
edged with soiled white; in other specimens this edging ap- 
proaches ochraceous. The tail presents the second lateral black 
stripe (concealed), although this stripe is far less extensive than 
in lateralis. 
An adult male chrysodeirus from Mt. Shasta, taken July 28, 
1904 (no. 3302), is at hand and may be profitably examined 
with the above description in mind. It is shehtly lighter ochra- 
ceous about the head and shoulders, and has not so many black 
hairs on the nose. Eyelids not so prominently white. Ears 
varying from hazel on the anterior edge to tawny ochracecus 
posteriorly. Hairs on inside brown (ochraceous to hazel) with 
no black endings. The three lateral stripes broad. Average 
