SPERMOPHILUS ANNULATUS.— Aud. and Bach, 
PLATE LXXI X.— Male— Natural Size. 
S. Super cervinus, pilis nigris, interspersis, subtus albido. Cauda cor- 
pore longiore, annulis, 17-20 nigris. 
CHAEACTBRS. 
Reddish-brown above, speckled with black beneath. Tail, which is longer 
than the body, annulated, with from seventeen to twenty black bands. 
SyNONYME. 
SpERMOPHiLtrs Annulatus. Aud. & Bach. Transactions of the Academy of 
Natural Sciences, Oct. 5th, 1841. 
description. 
In size, this species is scarcely larger than the Hudson’s Bay Squirrel, 
{S. Hudsonius.) In the shape of the head it resembles Spermophiliis 
Parnyi. The ears are quite small, being scarcely visible above its short 
coat of rather coarse, adpressed hairs ; they are thickly covered with hair 
on both surfaces. The nose is sharp ; whiskers, (which are numerous,) 
the length of the head. Eyes of moderate size, situated on the sides of the 
head. The os-frontis is rounded between the orbits, as in -S'. Franklinii. 
The cheek pouches are pretty large, and open into the mouth immediately 
anterior to the grinders. The body is more slender than the spermophiles 
in general, and in this, and several other peculiarities which will be men- 
tioned, this species approaches the genus Sciu7'us. On the fore-foot, a 
sharp, conical nail is inserted on the tubercle which represents the thumb. 
There are four toes, covered to the extremities with a close, smooth coat 
of hair. The first and the fourth toe are of equal length. The second 
and third, which are longest, are also uniform in length. The nails are 
short, crooked and sharp, like those of the Squirrels, and not like those of 
the Marmots and Spermophili in general, which are long and slender, 
and but slightly curved. The legs are long and slender. The hair on 
the back is rather short, and lies close and smooth. The short fur 
beneath this coarser hair is rather sparingly distributed. On the under 
