96 ALLEN’S NATURALIST’S LIBRARY. 
Of this species there are two forms, an eas/ervn and a 
northern, the latter being always smaller in size, with the fur 
lighter and less rusty. In some varieties the upper surface is 
dark rusty-red all over, and the inner sides of the limbs pure 
white. Examples from the north-west coast are constantly 
smaller ; the head rounder, and the facial hairs grey ; no white 
band on the forehead ; upper surface bright yellowish-brown ; 
_ tail rusty-grey ; under side of hind-limbs pure white, the under 
surface and inner side of the arms whitish. The variation in 
coloration is due to the middle part of the hairs, which in 
typical specimens is rusty-red, but is yellow in the above- 
mentioned form. Hands and feet grey. 
Young.—Ashy-grey, slightly washed with red. 
Distribution The Woolly Avahi seems to inhabit only the 
forests of the parallel ranges of the mountains which face the 
whole eastern coast of Madagascar; it extends round the bay 
of Passandava on the west coast, opposite to the northern . 
termination of this eastern range of mountains. 
Habits.—This species—the smallest of the Zzdristne—being 
essentially nocturnal, is torpid during the day, and is the wild- 
est and least docile of the family. The first specimen of the 
“ Ayahi,” the name by which this animal is known among 
the Anatala tribe, was brought to Europe by Sonnerat, the 
French traveller, in 1781, and nearly half a century elapsed be- 
fore a second one was obtained. Since then several specimens 
have been kept in captivity in the different zoological gardens 
of Europe. 
THE SIFAKAS. GENUS PROPITHECUS. 
Propithecus, Bennett, P. Z.S., 1832, p. 20; Milne-Edwards 
and Grandid., Hist. Nat. Madag., Mamm., 1, p. 288 
(with full synonymy). 
