168 PROFIT HECUS 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES AND SUBSPECIES. 



On the eastern coast of Madagascar, P. diadema ranges from the 

 Bay of Antongil on the north to the Masora River in the south ; and 

 P. d. edwardsi from the Faraouny to the Masora ; and north of An- 

 tongil Bay P. V. sericeus is found. On the west coast, in the northern 

 part P. V. coronatus is met with from the Bay of Mozamba to the 

 Manjaray River, and also for some distance into the interior. Between 

 the southern base of the eastern range of mountains and the River 

 Tsidsibon P. verreauxi is found; while P. v. coquereli is met with 

 from the north side of Bombetok Bay to the south side of Marendry 

 Bay, the Betsiboka River being its southern limit. In the center of the 

 west coast on the great plains between the Rivers Mananbolo and Man- 

 zarayo, P. v. deckeni has its range. 



KEY TO THE SPECIES AND SUBSPECIES. 



A. Face and nose black. 



a. Body not mostly white. 



a.' Forehead white, back dark gray P. diadema. 



b.' Forehead black glossed with purple, back 



chestnut P. d. edwardsi. 



B. Face black spotted with yellow P. d. sericeus. 



C. Face and ears black. 



a. Body mostly white. 



a.' Outer side of limbs ashy gray. 



a." Under parts white P. verreauxi. 



b." Under parts bright rufous P. v. deckeni. 



D. Face black, nose white. 



a. Outer side of limbs dark maroon P. v. coquereli. 



b. Outer side of limbs rusty red P. v. coronatus. 



With species, such as these of this genus, which vary from each 

 other in an almost unlimited degree, no key can be constructed to give 

 all the phases of coloration. What may therefore be considered as 

 representing the typical styles has been selected in the descriptions of 

 the dififerent forms embraced in the above key. 



Peopithecus diadema Bennett. 



Propithecus diadema Bennett, Proc. Zool. Soc. Lond., 1832, p. 20; 

 Ogilby, The Naturalist, II, 1837, p. 9; Less., Spec. Mamm., 

 1840, p. 220 : Gray, List Mamm. Brit. Mus., 1843, p. 16 ; van 



