1882. ] MR. 0. THOMAS ON RODENTS FROM PERU. 103 
grizzled with dark greyish yellow. Belly white, the basal halves of 
the hairs, however, both above and below, dark slate-colour. The 
back- and belly-colours rather sharply separated. I'eet greyish white. 
Tail brown above and white below, the latter colour, however, grad- 
ually becoming darker, so that the distal half of the tail is nearly 
uniform. Foot-pads prominent; soles naked, proximal halves quite 
smooth, distal halves coarsely granulated. Fifth hind toes, without 
claws, only reaching just to the end of the fourth metatarsals. Ears 
with a projection on the anterior border'. Skull with well-marked 
supraorbital ridges. 
“These Rats created great havoc among the stores of maize under 
the roof of the house. After atime they multiplied to such an 
extent that I caught 14 in one night. This species also did con- 
siderable damage in the plantations of cocoa, gnawing holes in the 
skins of the fruit, and eating the contents.” 
5. Hesprromys (CALoMys) ALBIGULARIS, Tomes, P. Z, 8. 1860, 
p. 264. 
a. Cutervo, 9200’, Feb. or Mar. 1879. 
b-f. Tambillo, 5800', Feb. 1878. 
g- Callacate, 4800’, Apr. 1879. 
h. Huambo, 3700’, Apr. and May 1880. 
Head and Forearm Ear-conch, Muzzle 
body. Tail. Hind foot. and hand. length. to ear. 
a o.. 50 6:2 1:24 1-48 69 1°25 
UMS 0 Ok 6-6 1:3 1:56 ‘70 1-28 
« 9.. 49 6°5 1-24 1:46 “72 1:24 
To this species I refer eight of the specimens, from various loca- 
lities. As Mr. Tomes’s account was drawn up from skins, the follow- 
ing description may be useful :— 
Fur long, soft and fine, with a few longer black hairs intermixed. 
General colour above deep rufous, becoming clearer on the sides, 
and passing gradually into pale rufous on the belly. Basal two 
thirds of the hairs dark slate-colour all over the body, except that in 
some of the specimens there is a pure white blotch just between the 
fore legs, a peculiarity which suggested Mr. Tomes’s name for the 
species. Anterior half of the outer and posterior half of the inner 
sides of the ears thinly covered with black hairs, the remainder nearly 
naked. Feet white, with the exception of the metacarpals and 
metatarsals, on which there are a few brown hairs intermixed. Tail 
very long and slender, above brown and beneath white for its whole 
length, the two colours rather sharply separated. Anterior border 
of ears without any projection. Mammee 8, two pectoral and two 
inguinal pairs. Soles naked, foot-pads large and prominent, fifth 
hind toes, without claws, reaching to the middle of the first phalanx 
of the fourth toes. 
It will be seen that the above description does not quite agree 
with that of Mr. Tomes; but I do not think that the differences are of 
See P. Z.S. 1881, p. 4. 
