138 DR. J. E. GRAY ON THE SPECIES OF LEMUROIDS. [April 21, 



iron-grey spot on each side of the forehead. Skull elongate, length 

 3-6, breadth 2*0; canines very large; interorbital space broad, 

 convex ; forehead flat ; orbits produced on the sides. 



**** Temjiles rufous ; the hairs elongated {forming a kind of 

 whisker^ beneath. 



5. Prosimia rufifrons. B.M. 



Lemur mongos, Schreb. Saugeth. i. t. 39 a (moderate). 



Lemur rufifrons, Bennett, P. Z. S. 1833, p. 106 ; Fraser, P. Z. S. 

 1845; Zool.'Typica, t. (bad). 



Fur gi"ey, with two small white cross streaks on each side of the 

 rump ; throat and beneath rufous ; nose and line up the middle of 

 the forehead black ; sides of nose, cheeks, and large spot on each 

 side of the forehead white ; tail blackish, rather rufous at the base. 



Hah. Madagascar {Brit. Mus.). 



Both Schreber's and Fraser's figures leave out the peculiar stripes 

 on the side of the rump. 



Lemur rufus (Geoff.), Maki roux (Audeb. Makis, t. 2), seems to 

 resemble this species, but we have it not ; it may be only a variety. 



Lemur rufiventer (I. Geoff. Cat. Mamm. 71) and Lemur faviventer 

 (I. GeofF. Cat. Mamm. 72) are probably aUied species. 



6. Prosimia xanthomystax. (PI. XVII.) B.M. 



Lemur xanthomystax. Gray, B.jNI. 



Fur grey-brown, with a broad, black, indistinct dorsal streak ; chin, 

 chest, and beneath pale rufous ; head and back of neck black ; a 

 large puffy spot on each side of the throat under the ear bright 

 rufous ; a large spot on each side of the forehead over the eyes 

 grey ; tail brown, blackish-washed. 



Hah. Madagascar {Brit. Mus.). 



This may be easily known from P. mongoz (with which it agrees 

 by having the grey spot on the forehead) by the dorsal streak, and 

 the red puff on the temples. 



***** Temples and cheeks and sometimes the side of the neck rufous. 



7. Prosimia coronata. B.M. 



Lemur coronatus. Gray, Ann. and Mag. N. H. 1842, x. 257; Voy. 

 Sulphur, t. 4. 



Fur pale grey ; beneath reddish white ; face white ; temple, 

 cheeks, and forehead rufous ; spot on the crown of the head black ; 

 tail blackish, rufous at the base. 



Var. white, Maki albine, Chenu, Ency. N. H. Quadr. 263, fig. 



Hab. Madagascar {Brit. Mus.). 



Lemur chrysampgx (Scheurmann, Acad. Brux. xxii., 1848), ac- 

 cording to M. I. Geoffroy, diflFers from the foregoing species in the 

 absence of the black spot on the crown, and the white colour of the 

 lower and outer parts. 



