6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



The Mau forest near Enjoro where Colonel Roosevelt obtained the 

 types represents the extreme eastern limit of this race. It is pri- 

 marily a highland race occupying the high forest of the Mau Escarp- 

 ment. Along the western edge of the Mau Escarpment in the Kavir- 

 ondo country it meets the race described by Neumann as matschiei 

 which is really the lowland Uganda Colobus which extends as far 

 east as the Kavirondo district and the slopes of Mount Elgon. 



COLOBUS ABYSSINICUS PERCIVALI, new subspecies 

 Uaragees Colobus Monkey 



Type from Mount Uaragess, British East Africa; adult male, Cat. 

 No. 182138, U. S. Nat. Mus. ; collected by Edmund Heller, August 

 22, 191 1 ; original number 2447. 



Characters. — The Colobus inhabiting Mount Uaragess may be 

 distinguished from typical Colobus abyssinicus caudatus of Kiliman- 

 jaro by the smaller white tail tuft, longer tail, larger body size and 

 skull. The latter is distinguishable from caudatus by the union of the 

 temporal ridges into a sagittal crest. In typical caudatus the white 

 tail tuft is of immense size and occupies the whole tail with the excep- 

 tion of the basal one-fourth which is black but in the Uaragess race 

 the whole basal half of the tail is black the white tuft being reduced 

 to the terminal half. In the Abyssinian race, abyssinicus, the white 

 tail tuft is still further reduced and is limited to the terminal fourth. 



The measurements of the type in the flesh were : head and body, 

 645 mm. ; tail, 645 ; hindf oot, 190 ; ear, 38. Skull of the type old with 

 the occipital sutures obsolete, but molars show little wear: greatest 

 length, 102 ; basilar length, 87 ; zygomatic breadth, 89 ; post-orbital 

 constriction, 45; median length of nasal bones, 15; width of palate 

 at last molar, 20 ; length of upper molar series, 35 ; length of mandible, 

 92. Besides the type there is one other specimen, an adult male, from 

 Mount Uaragess in the collection. These have been compared with 

 a series of 17 adult males from Kenia, Kijabe and Kilimanjaro. The 

 largest in this series is exceeded in body size and length of tail by the 

 type. The Uaragess race is confined to the forested summit of Mount 

 Uaragess where it is a rather rare animal. But one troupe of some 

 20 individuals was noted during a week's sojourn on the northern 

 peak. The forested area of Uaragess is separated from that of 

 Mount Kenia by a hundred-mile stretch of low desert which com- 

 pletely isolates this race from communication with the caudatus 

 inhabiting Kenia. Named for A. Blaynel Percival to whom the 



