RODENTIA—SCIURINAE—SCIURUS HUDSONIUS. 27) 
The Sciwrus hudsonius is thus a very strongly marked species, and is readily distinguished 
from any hitherto described by the various characters assigned. 
The amount of hair on the soles depends very much upon the latitude and season. The 
specimen described at length above is a winter one. In summer the sole is hairy posteriorly 
for about half the distance from the heel to the tips of the toes; the region immediately behind 
the tubercles at the bases of the digits being naked. The isolated posterior tubercle of all 
towards the heel is also nearly naked, though coated with hair in winter. 
The tufting of the ears seems to vary in quite a similar manner, in some summer specimens 
the tufts being entirely wanting. 
The black line on the flanks, reaching from fore to hind legs, is quite variable in its appear- 
ance, being in most specimens wanting entirely, in others very faintly indicated. As stated, 
the amount of rusty chestnut varies greatly, sometimes diffused over the whole back, sometimes 
forming a broad or narrow dorsal stripe, in which the hairs are not at all annulated, and again 
quite inconspicuous. The upper part of the tail, however, always seems to retain its bright 
light chestnut or rusty, without annulation. 
Specimens from Halifax and Labrador present a very interesting difference from more southern 
skins in the much grayer cast of the under parts, the hairs at the same time appreciably annu- 
lated into black at tip, or subterminally. The fur is fuller, the tail well provided with under 
fur, giving a slight resemblance to that of the S. vulgaris, though it is not so cylindrical. 
These characters are indicated by Pennant, in his original description of the species from 
Labrador specimens. 
Specimens from Mississippi have the ear covered with short hairs; the soles hairy to within 
a short distance of the digital tubercles. 
Last of specimens. 
Catalogue | Corresponding | Sex & Locality. When collected.| Whence obtained. Nature of specimen. 
number. | No. of skulls. | age. 
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