10 PROCEEDINGS OP THE ACADEMY OF 



6. B. americana Gory, 4, 346; tab. 58, 343. Metonius purpureas 

 Say, This and the next species belong to Solier's genus Pachyscelis, but the 

 name given by Say has priority. 



7. B, punctata Gory, 4, 347 ; tab. 59, 344. Metonius or at us Say. 



Becriptions of several new MAMMALS from Western Africa. 



BY JOHN LECONTE. 



Among a large collection of birds sent from Africa by M. du Chaillu, were a 

 few species of Mammals, which have been referred to me for examination. The 

 following is the result of my researches. Some of them appear to be new, at 

 least I cannot find any thing like them described in any book in the possession 

 of the Academy. I have hesitated about naming them, as some of them may be 

 well known in Europe, but imperfectly described. 



Semnopithecus anthracinus. 



Entirely black, hair rather glossy, from two to three inches in length, over 

 the eyes and on the top of the head coarse and bristly. Tragus broad. Thumb 

 of the fore hands a mere oblong tubercle. Nails, except of the hind thumb, long 

 and narrow. Tail very long, slightly tapering towards the point. 



Length 2 feet 2 inches ; tail 2 feet 7 inphes ; arms 1 foot 6 inches ; legs 1 foot 

 9 inches. Seems to resemble the Colobus satanas of Waterhouse, Loud. Mag. 

 for 1838, p. 335, which was brought from the Island of Fernando Po. The length 

 of the hair in the specimen sent to England is stated by the very accurate natu- 

 ralist who describes it to be ten inches, whereas in our animal it rarely in any 

 part exceeds two. 



Cbrcopithecus buccalis. 



Above and on the sides, hair deep cinereous, annulate with rufous beneath, 

 and on the inner parts of the thighs grey. Hair of the head black, annulate like 

 that of the back. Cheeks with a large yellow spot which extends even behind 

 the ear ; behind the eye this spot appears to be bounded above by black. Arms 

 and hands black, the hairs more or less tipped with rufous ; beneath, except 

 near the hands, they are grey. Tail for one-third of its length, above the 

 color of the back, beneath grey ; the rest of the tail is both above and beneath 

 bright rufous, increasing in intensity to the end. Nails long, narrow and com- 

 pressed. No callosities on the rump. 



Length 1 foot 8 inehes ; tail 2 feet 5 inches ; arms 8 inches ; legs 1 foot 2 

 inches. 



MiOROCEBUS ELEGANTULUS. 



Hair soft, dark cinereous, tipped with rufous brown, beneath with grey, the 

 latter color extending somewhat towards the back from the axillae and the groins, 

 and on the forward edge of the legs and thighs; tail longer than the body, cy- 

 lindrical, bushy, the hair tipped with grey, and at its root for about one inch in 

 length with rufous. Nose rather pointed. Ears large, oblong, naked except at the 

 base; lower fore teeth nearly horizontal ; nails of the fore hands round with an 

 acumination ; nail of the hind thumb flat, of the first finger falciform and sharp ; 

 of the other fingers like those on the fore hands. 



Length 8 inches ; tail 12 inches ; head 1 foot 9 inches ; ears I inch. 



Vespertilio pusillus. 



Black, body beneath a little mixed with gray. Head short and small. Upper 

 fore teeth four, distant by pairs, simple ; lower, six, trilobate ; nose not eraarginate. 

 Ears small, oval, orillon lanceolate and rather blunt. Interfemoral membrane 

 naked except at the base; tail projecting a little beyond the membrane. 



Length 1'3 in. ; ears -24; tail -8 ; naked part -05. Extent 6-9. 



[Jan- 



