NO. 17 UNGULATES AND PRIMATES FROM AFRICA -HELLER 5 



tion. They all agree closely in their light buffy coloration. The horn 

 character, however, may not be constant as it is based Oil a -an-le 

 specimen. A large series of the highland races, however, do not 

 show any variation toward vertically directed horns. Deserti LS a 

 lowland race occupying the Tarn Desert and the nyikae of the coast 

 slope generally as far north no doubt as the Tana River. It differs 

 strikingly from the Athi 1 Mains race described as hindei winch is a 

 dark tawny form. A series of seven specimens of the latter in the 

 National Museum have been available for comparison with deserti. 

 The lowland Xile race, roosevelti, is a much smaller and darker 

 colored animal and is readily distinguishable by its small size from all 

 the East African races. 



COLOBUS ABYSSINICUS ROOSEVELTI, new subspecies 

 Mau Colobus Monkey 



Type from the Mail forest near Enjoro, British East Africa, adult 

 male. Cat. Xo. 163261, U. S. Xat. Mus. ; shot by Colonel Theodore 

 Roosevelt, December 6, 1909 ; original number ( Heller) 513. 



Characters. — Resembling most closely Colobus abyssinicus mat- 

 sehiei of the Kavirondo country but differing- by its smaller size, 

 shorter and more extensively black tail and the presence of a sagittal 

 crest on the skull when ag'ed. From the white-tailed Colobus of the 

 Kikuyu Escarpment, the Aberdares, and Mount Kenia it is easily 

 distinguishable by the absence of the large white tail, the white tail 

 tuft being reduced to the terminal one-fourth of the tail, the basal 

 three- fourths of which is clotbed by short black hair. 



Four specimens of this race shot by Colonel Roosevelt near Enjoro 

 are in the Xational Museum. These have been compared with a 

 series of five specimens of matschiei from the Kaknmega forest 

 which are practically topotypes. The skulls of matschiei are de- 

 cidedly larger and their pareital ridges do not unite on the occipital 

 region to form a crest but run parallel and widely separated to their 

 junction with the lambdoidal crest. 



Xo flesh measurements of this race are available. The type skull 

 has the following dimensions: greatest length, 117 mm.: basilar 

 length, 85; zygomatic breadth, 86; post orbital construction, 45; 

 median nasal length, 26.4; width of palate in front between pre- 

 molars, 22; width of palate at last molar, 20: length of upper molar 

 series, 32.5. An adult male of matschiei of the same age has a 

 skull length of 127 and a zygomatic width of 92. 



