No. 286 Sciurus Hippurus. — The Chestnut-bellied Assam Squirrel
Habitat.—Assam; also in the Malayan peninsula.
Description.—Upper parts of the body, with base of tail yellowish-rufous, punctulated with yellow and black; the lower parts deep ruddy ferruginous or chestnut; feet, tail (which is bushy) and whiskers black.
Dr. Anderson, however, mentions several varieties. He writes: “The specimen in the British Museum referred by Dr. Gray to S. rufogaster, var. Borneoensis differs from Malayan specimens in having portions of the upper parts unannulated and of a deep rich chestnut, which embraces the upper surface of the base of the tail, and is concolorous with the chestnut of the under parts. This, however, is evidently not a persistent form, because I have seen a specimen from the same island in which the red portion of the upper parts is grizzled and much of the same tint as Malayan individuals, except in the mesial line of the neck and back, where the colour is rich red-brown extending along the dorsum of the tail for about three inches.
“Müller and Schlegel mention a variety that I have not seen, and of which they state that the red colour of the under parts extends to the heel, the forefoot and the toes, while the colour of the upper parts passes into a uniform lustrous black. They also remark, however, that the back not unfrequently assumes a pale yellowish brown tint” (‘Anat. and Zool. Res.’ p. 242).
Horsfield remarks:—“This species is nearly allied to the S. erythræus of Pallas, but it varies in the depth of the colours both above and underneath.”
“In the skull the orbit is rather large, and the muzzle is so contracted at its base that the extremity is but little narrower.”—Anderson.
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