852 DR. J. E. GRAY ON THE LEMURINA. [Nov. 19, 



It has been suggested that the colour of H. griseus and P. simus are 

 so alike that they are only the sexes of the same species ; but this is 

 a point that can only be determined by a naturalist who can observe 

 them in the wild state, and unfortunately it is to the pecuniary in- 

 terest of the persons who collect animals for sale to make species as 

 numerous as they can. 



Tribe 2. Lemurina. 



The cutting-teeth on the sides of the intermaxillary with a very 

 wide space in the middle between them. 



4. Lemur, Gray, Cat. Monkeys &c. 1870, p. 72. 

 In the ' Catalogue of Monkeys ' the teeth of this genus are figured 

 from Huxley. 



Lemur catta, Gray, Cat. Monkeys &c. p. 72. 



5. Prosimia, Gray, Cat. Monkeys &c. p. 73. 



The skull of Prosimia albifrons, figured by Blainv. (Osteogr. 

 t. vii.) and Van der Hoeven (Nat. Tijdsch. p. 11, t. i. f. 2). 



There seems to be considerable difference of the colour between 

 the sexes of the species of this genus, and almost as much difference 

 in the opinion of the keepers of the menageries as to what are the 

 differences. 



Thus Cuvier considered Prosimia anjuanensis the female of P. 

 albifrons; but Mr. W. MacLeay (Linn. Trans, xiii. p. 624) says 

 that both sexes of this species have a white forehead. Dr. Sclater 

 (P. Z. S. 1871, p. 231, t. 16) figures P. collaris as the male and P. 

 nigrifrons as the female of the same species ; and, curiously enough, 

 Mr. Bennett, in the ' Gardens and Menageries of the Zool. Soc' 

 i. p. 31, says that both P. nigrifrons in the Society's menageries 

 were females. 



I strongly suspect the real fact is that the specimens in confine- 

 ment frequently have promiscuous intercourse, and that the result is 

 that a number of hybrids render their distinction more difficult, 

 which perhaps explains the existence of some of the doubtful species. 



Fortunately we are now obtaining some wild specimensof this genus. 



Prosimia rufipes. (Plate LXIX.) 



Fur woolly, thick, dark rufous brown, with a golden gloss from 

 the tips of the hairs, the sides of the head and cheeks, the hand and 

 arm. and the feet and the sides to the under part of the body bright 

 bay. Tail nearly black, rather longer than the head and body. 



Male with the middle of the throat greyish, face with short 

 blackish hair. 



Female similar above, but with the chin, throat, and underpart 

 of the body reddish grey, the face and edge of the under jaw 

 covered with blackish hairs. 



Prosimia rufipes, Gray, Ann. & Mag. N. Hist. 1871, vii. p. 339. 



Hub. Madagascar (Mr. Crossley), B.M. 



