1886, | of the Common Eastern Chipmunk. 241 
the other hand, are more distinct in the Northern than in the 
Southern animal. These markings, however, vary so much in 
individuals in respect to clearness of definition that they may be 
dismissed as unimportant in the present connection. 
In brief, it may be said that the Northern animal differs from the 
Southern in the clearness and lightness of its colors, the black 
stripes remaining much alike in both; or, conversely, that the 
Southern is characterized by an intensification of all the colors, 
resulting in the darkening of the entire upper surface. 
Richardson, in 1829, seems to have been first to describe the 
Northern form, though he did not suspect it to differ from the 
Southern. Believing that the specific name s¢riatus belonged to 
the Asiatic animal, and assuming the American to be distinct, he 
called the latter “Sciurus (Tamias) Lysteri. (Ray.),” but was wrong 
in supposing that Ray had named it before him. Baird expressed 
the matter in a nutshell when he said, “ This author [Richardson] 
quotes Ray as the authority of this name, but it is, in fact, his 
own—Ray only referring to the species as Sciurus a Clar. Dom. 
| Lyster observatus” (North American Mammals, 1857, p. 295). 
Richardson’s account of the animal he had in view admits of 
no question as to its exclusive applicability to the present form, 
and his plate (plate xv), though uncolored, is equally unmistak- 
able. Furthermore, he distinctly states that his specimen came 
from Penetanguishene, which is on the north-east arm of Lake 
Huron, a region which, theoretically at least, ought to furnish 
most typical examples. His description was taken from “a 
recent male specimen, killed in April at Penetanguishene.” The 
portion of it relating to color runs as follows: 
r —The dorsal aspect of the head is covered with yellowish-brown hairs, 
which are mixed with a smaller number of black ones. There is a black spot near 
the tip of the nose. The eyelashes are black, the eyelids white; there is a dark- 
wn streak between the eye and the ear, and a broad, yellowish-brown stripe ex- 
tends from the nose, under the eye, to behind the ear, deepening in its middle to 
chestnut-brown. The anterior part of the back is hoary-gray, from a mixture of 
black and white hairs. The e rump, hips and exterior surfaces of the thighs are of a 
bright orange-brown color, mixed with a few black hairs. A dark dorsal line com- 
mences at the occiput, and reaches to within an inch of the tail. This line is 
wnish at its commencement, but deepens to black posteriorly. There are also, 
on each flank, two black lines. , which commence behind the shoulders, — to the 
hips, and are separated by a moa broad white stripe. All these stripes are 
73 or less bordered with brown. The sides, beneath the stripes, ec a mixture © 
or gray and very light brown. The fur, covering the throat, chin, belly, and inner 
Surface of the extremities, is longer and thinner than that on the dorsal aspect, = os 
