888 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
be no doubt of its identity with Mr. Xantus’s specimen above described. The 
only discrepancies consist in Audubon and Bachman’s specimen being a little 
smaller than the present one, and the tail is represented as being relatively a 
little longer and the color of the ventral surface of the body a little lighter, 
but in every other detail of structure and coloration there is the closest 
agreement. Although evidently a true Spermophile, in all probability ref- 
erable to the subgenus Otospermophilus, the absence of the skull renders it 
impossible to refer it to any particular section of the genus Spermophitlus. 
In 1827, Major Hamilton-Smith, in Griffith’s Cuvier’s Animal Kingdom 
(vol. iii, p. 190), described and figured a “‘ Sczurus lewisiz”, said to have been 
based on a specimen in ‘‘ Mr. Peal’s Museum in Philadelphia, .... brought 
there by the American Missouri travellers, Messrs. Lewis and Clarke”, the 
name being given in honor of Captain Lewis. The figure and description 
strongly recall the present species.* The tail is similarly barred transversely 
(but the bars are fewer and broader), and the general color seems to resem- 
ble that of the Spermophilus annulatus of Audubon and Bachman. Professor 
Baird has very doubtfully referred the Sczwrus lewist to Sciurus “ludovicianus”, 
supposing that the barring of the tail might have been due to a twisting of 
that member. He expresses himself as at a loss to account for the absence 
of red in the tail, but says that unless it be assignable to this species he can- 
not refer it to any known North American species. If, however, Hamilton- 
Smith’s figure be considered as at all trustworthy, his ‘‘ Lewis’s Squirrel” 
bears a much nearer resemblance to the Spermophilus annulatus than to any 
other known species of Sccurzde. If really to be referred to this, the speci- 
men was probably not ‘brought to Philadelphia” by Lewis and Clarke, but 
was doubtless derivedgfrom some wholly: different source. 
Hamilton-Smith traces a resemblance between his animal and the Sciurus 
annulatus described in 1822 by Desmarest from a ‘specimen in the Paris 
* The description is as follows :—‘ Lewis’s Squirrel has the upper part of the head, neck, shoulders, 
fore arms, to the articulation of the arm, backs flanks [sic], the posterior moiety of the thighs, and a 
band round the belly, of ochrey gray colour ; all the under parts, the inside of the limbs, and the paws 
are pure ochrey; the ears are small, round, and far back ; the eyes are black and surrounded with the 
same colour as the back; the nostrils open at the extremity of the muzzle, forming a denuded black 
snout, the upper lip is white, and the whiskers very long; the tail is very beautiful, extremely thick or 
bushy, cylindrical and anuulated, with seven black and six white bands, with the termination black.” 
They add,—* This appears to be the Sciurus annulatus, described by M. Desmarest, Encyclopédie Méthodique, 
article Mammalogie, from a specimen in the museum at Paris, whose habitat is unknown. His specifie 
characters, however, are fur of a bright-greenish-gray above, without lateral white bands, white under- 
neath, tail longer than the body, round, annulated, black and white: of the size of the Palm Squirrel. 
These differences of colour may be sufficiently accounted for, to reconcile the probability of the identity 
of the species of these two specimens.” 
