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SPERM OP HILUS MACROURUS . — B esnett. 
Large-tailed Spermophile. 
PLATE CXXXIX .—Male.— Natural Size. 
S. Magnitudine Sciurum cinereum adequans, vellere crassiusculo, in 
dorso lateribusque cinereo nigroque vario, cauda corporis longitudine, 
mediocriter comosa. 
CHARACTERS. 
Size of the cat-squirrel (Sciurus cinereus) ; fur, rather coarse ; body, mot- 
tled with black , and ashy white, forming irregular interrupted narrow transverse 
bars on the back and sides ; tail, as long as the body, and moderately bushy. 
SYNONYME. 
Spermophilus Macrourus. Bennett, Proc. Zool. Soc., 1833, p. 41. 
Long-tailed Marmot. Zool. Soc. Catalogue, No. 456. 
Sciurus Luptus. Named in the Museum of the Jardin des Plantes, but not described. 
DESCRIPTION. 
This animal is shaped very much like a squirrel, although the ears are 
farther back in the head and the body is stouter than in that genus. 
Head, of moderate size, round, and elongated ; nose, somewhat pointed ; 
ears, large, broad, and ovate towards the points ; feet, stout ; nails, long, 
sharp, and considerably arched ; tail, rounded, possessing none of the 
distichous arrangement of the tails of squirrels ; tarsi, naked beneath ; 
fur, moderately long, and rather coarse and harsh to the touch. 
COLOUR. 
Hairs of the back, blackish-gray at the base, annulated with white, or 
brownish-white, towards the tips, which are black ; crown of the head, 
pure black ; muzzle, rufous brown above, whitish on the sides ; a narrow 
whitish space around the eyes ; on the lower part of the cheeks and on 
the throat the hairs are brownish-white ; cheeks, grizzled black and white ; 
ears, internally covered with short hairs and partly coloured on the inner 
