EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 79 



Specimens. — Thirteen, from the following localities: 



British East Africa: Engare Narok River, 12 (Loring); Njoro 



O Nyiro (Oljoro O Nyon), 1 (Heller). 



This is a slightly marked form. It averages less reddish, more 



dusky, in color than jacksoni, and has larger ears and longer fur. 



RATTUS DE>fNI^ (Thomas). 



Plate 21. 



1906. Mus dennix Thomas, Ann. and Mag. Nat. Hist., ser. 7, vol. 18, p. 144. 



August. (Ruwenzori East, Uganda, altitude 7,000 feet; type in British 



Mus.) 

 1910. Mus dennix Thomas and Wroughton. Trans. Zool. Soc. London, vol. 19. 



p. 504, March. 

 1910. Epimys endorobx Heller, Smithsonian Misc. Coll., vol. 56, No. 9, p. 3. 



July 22. (Western edge of Mau Forest, 25 miles north of Eldoma Ravine, 

 » British Eaat Africa, altitude 8,600 feet; type in U. S. Nat. Mus.) 



1910. Epimys endorobx Roosevelt, African Game Trails, Amer. ed., p. 473; 



London ed., p. 485. 



Specimens. — Forty-seven, from the following localities: 



Uganda: Ruwenzori East, 1 (Dent). 



British East Africa: Aberdare Mountains, 2 (Heller); Guas 

 Ngishu Plateau, 25 and 30 miles north of Eldoma Ravine, 2 (Heller) ; 

 West side of Mount Kenia, 42 (Loring, Mearns, Heller). 



Specimens from British East Africa, representing Heller's Epimys 

 endorobse, do not differ enough from the Ruwenzori form to warrant 

 recognition as a separate race. I can find no characters to distin- 

 guish our Ruwenzori specimen from many of the skins and skulls 

 from Mount Kenia. The dark area between the nose and eye is 

 sharply defined in the Ruwenzori skin and faintly indicated on many 

 of the Kenia specimens, but the specimens were collected at widely 

 different seasons and a few of the British East African skins, including 

 the type of endorobx, show the dark area very much as in the Uganda 

 skin of dennix. 



For measurements of specimens, see page 80. 



RATTUS TAIT/E (HeUer). 



Plate 21. 



1912. Epimys taitx Heller, Smithsonian Misc. Coll., vol. 59, No. 16, p. 9. July 

 5. (Mount Mbololo, Taita Hills, British East Africa, 5,000 feet altitude; 

 type in U. S. Nat. Mus.) 



Specimens. — Fifty, from the following localities: 



British East Africa: Mount Mbololo, 41, including 18 m alcohol 

 (Heller); Mount Umengo, 9 (Heller). 



These specimens were all trapped in the heavy forests on the 

 summits of the mountains. There appear to be no differences 

 between skins from the two localities. A female from Mount Mbololo, 

 November 5, contained five embryos; and one from Umengo, Novem- 

 ber 11, four embryos. 



