464 On South-American Monkeys, Bats, §c. 
and belly, creamy buff varying to buffy white on the chest. 
Ears short-haired, without trace of fringes, their backs 
slightly more fulvous than the general colour. Upper surface 
of hands and feet generally becoming more fulvous terminally. 
Tail comparatively narrow, its breadth across the outstretched 
hairs not or scarcely exceeding 2 inches, its colour blackish 
washed with white, the two basal light rings of the hairs 
fulvous, but these are quite hidden by the broad black sub- 
terminal and white terminal bands; below they show more, 
so that the colour is there grizzled fulvous mesially, edged 
sublaterally with black and laterally with white. Mamme 8. 
Dimensions of the type (measured in the flesh) :— 
Head and body 175 millim.; tail 172; hind foot, s, u. 44, 
c. u. 47°53; ear 20. 
Skull: greatest length 46 millim. 
Hab. 8. Lourengo, near Pernambuco. Alt. 50 m. 
Type. Adult male. Original number 1613. Collected 
29th July, 1903, by Alphonse Robert. Twelve specimens. 
This squirrel evidently represents in the north-eastern 
corner of South America the S. Jngrami of Southern Brazil, 
of which Mr. Robert has collected a large series at localities 
ranging from Espirito Santo to Parand. 
In its general proportions it approaches the Amazonian 
S. gilvigularis, but differs from that and agrees with S. Jn- 
grami by the much paler colour of its under surface. From 
S. Ingram? in turn it may be distinguished by its shorter fur, 
unfringed ears, less bushy tail, the whiter instead of buffy 
colour of the inner sides of its limbs, and the white instead of 
yellow tipping to the caudal hairs. 
Sciurus Ingrami was the first of the many discoveries made 
by Mr. Robert during his highly successful collecting tour in 
Brazil, and I have now had much pleasure in naming after 
him the present squirrel, its ally, obtained at the last locality 
worked by him before his return to Kurope. 
A Special Genus for Dasyprocta acouchy. 
The long-tailed Agouti, ‘““Dasyprocta” acouchy, Linn., is 
clearly a very different animal from all the ordinary members 
of Dasyprocta, and should, I think, be separated generically 
from them. Its main distinctive features are its well- 
developed tail and conspicuously smaller teeth, these latter 
being smaller, both relatively and absolutely, than in any 
species of Dasyprocta. 
I would therefore propose to call it Myoprocta acouchy. 
