778 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
Sciurus carolinensis. Jf the specimen came really from North America, it is 
far more likely referable to this species than to any other. 
Hamilton-Smith’s description in full is as follows :—* Clarke's Squirrel 
has the back, upper part of the head and neck, cheeks and tail, of a delicate 
silver-gray colour; the shoulders, flanks, belly, and posterior extremities, both. 
within and without, are white, with a slight ochery tint; on the sides of the 
nose and fore arms this tint deepens in intensity; the head is rather flattened 
and thick, the ears small and round; the eyes black, and situate on the sides 
of the head very far distant from each other, leaving a wide expanse of fore- 
head; the nostrils are semilunar in shape; the upper lip is cleft, and there is 
a black spot on the chin; the tail, which is flat and spreading, is very beau- 
tiful, not so full near its insertion as toward the middle, and again diminishing 
in breadth till it terminates in a point.”.—(Grifith’s Cuvier’s Animal King- 
dom, vol. iti, pp. 189, 190.) 
5.—Sciurus socratis Wagner. 
Sciurus socialis WAGNER, Abh. der math.-phys. Klasse der K. Bayer. Akad. d. Wissensch. ii, 1837, 504, pl. 
v; Suppl. Schreber’s Siiuget. iii, 1843, 171. 
In 1837, Wagner described two species of Mexican Squirrels under the 
names S. albipes (subsequently changed to S. varius) and S. socialis, neither 
of which I can satisfactorily determine. The first I have doubtfully referred 
to Sciurus boothie (see anted, p. 741), to some phases of which it seems to 
have a close resemblance. The S. sociadis, in its small size (length 8.50) and 
short tail (somewhat shorter than the head and body), differs from anything 
as yet known tome. Itis perhaps based on an immature specimen, in which 
ease its small size would be readily accounted for. I have met with no 
description of a species of this size from Mexico or Central America, except 
S. tephrogaster and S. @stuans var. rufoniger, from which it differs widely in 
coloration. Its short tail and small size suggest Sctwrus carolinensis, but its 
rusty-yellow lower surface and tail rusty-red below, bordered with black and 
edged with white, render its proper reference here wholly improbable. Pos- 
sibly it may have been described from an immature example of S. aureigaster 
(F. Cuv.=S. ferruginiventris Aud. and Bach.), to which I have been strongly 
inclined to refer it. Its short tail is here the chief point of discrepancy. 
Wagner's later description is as follows :— 
“Sc. sociatts Wagn. Das gesellige Eichhorn. 
' : : 
“Se. supra ex albo, cinereo et flavescente mixtus, subtus pallide flavus, 
auriculus fulvis, pedibus albidis, vellere molli” . 
