upper parts it exactly resembles _S. Blanfordii_, also
in its yellow feet and black tip to its tail, but, like _S. Phayrei_,
it has a broad blackish-brown lateral stripe. The others are smaller,
and resemble the foregoing specimens in all their characters, except
that they have no dark lateral streak, and that the feet of two are
concolorous with the upper parts, while in the remaining squirrel
the feet appear to be changing to yellow, as in the adult. The two
former of these, therefore, conform to the type of _S. pygerythrus_,
but the fur of the upper parts is greyer and not so richly coloured
as in it, but the annulation of the fur has the same character in
both. The remaining specimen in its features is distinctly referable
to _S. Blanfordii_" ('Anat. and Zool. Researches,' p. 232).

NO. 283. SCIURUS ATRODORSALIS.
_The Black-backed Squirrel_.

HABITAT.--Burmah and the Malayan countries. Common in Martaban.

DESCRIPTION.--There are two phases of colouring, in which both old
and young of this species are found: with the black on the back, and
again without it. In the latter case the upper parts and feet are
a yellowish-rufous. The upper surface of the head, as far back as
to include the ears, orange red; under parts and inside of limbs more
or less chestnut; under surface of neck orange yellow, with a centre
line of the same on the chest; tail variable--in the young it has
seven alternate orange and black bands, the orange being terminal;
but the adults have sometimes only five bands, the apical one so broad
as to make a rich orange tail with yellowish-white tipped hair. In
those with black backs the colour of the upper fur is less fulvous,
and the chestnut of the lower parts is darker; in some the tail has
broad orange tipped hairs, whilst in others it is, with the exception
of the base, wholly black, and not annulated. These differences in
colouring are not sexual, nor due to age. The skull of _S.
atrodorsalis_ resembles that of _S. caniceps_, but is broader, with
a somewhat shorter muzzle, has smaller teeth, and would appear to
be, from comparisons made by Dr. Anderson, smaller.

NO. 284. SCIURUS ERYTHRAEUS.
_The Assam Red-bellied Squirrel_.

HABITAT.--Assam, Garo hills, Munipur.

DESCRIPTION.--The upper parts glistening deep reddish-black,
minutely grizzled with light fulvous or yellowish-brown, each hair
having two annulations; under parts and inside of limbs dark reddish
maroon; feet black; tail conco