THE SIFAKAS. To. 
Body yellowish-white ; a spot on the top of the head dark 
brown, sometimes washed with rufous, separated from the face 
by a white,frontal bar. Face black ; eyes brownish-yellow ; 
interior of ears black, and naked ; a grey patch on the middle 
of the back; outer aspect of the fore-arms, and hind-legs, 
ashy-grey ; rest of the body white. Hands and feet white. 
Tail yellowish-white. Length of body, 18 inches ; of tail, 22 
inches. 
Young-—Entirely white, with a dark brown spot on the head ; 
the under surface of the bodywashed with rufous. 
Varieties. —Two well-marked varieties of this species are 
known, both of which were for many years considered to be 
distinct species. Continued exploration has, however, now re- 
sulted in the accumulation in various museums of a large 
amount of material from many localities, and this proves that 
the two forms really belong to but one species. 
VON DER DECKEN’S SIFAKA. PROPITHECUS DECKENI. 
Differs from the true P. verreawxi in having the face and 
ears black, and the body otherwise entirely grey, or white, 
washed more or less with yellow (sometimes rufous on the 
limbs); or of an ashy-grey colour on the loins, neck, and outer 
aspect of the limbs ; the under side bright rufous ; chest and 
inner sides of the limbs rusty-white, with a fulvous spot at the 
base of the tail. Specimens from the forests of the interior have a 
grey spot on the back of the neck expanding into a collar, which 
is absent in those from the coast. An albino variety comes, so 
far as is at present known, only from the wooded belts on the 
extensive plains between the rivers Manambolo and Manjaray, 
on the west coast. 
