EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 105 
are so widely separated, however, that the two forms are doubtless 
distinct. 
At the time that the original description of Kobus ellipsiprymnus 
kuru was printed the skull of the type specimen could not be found. 
It has since been located in the collection and placed with the types. 
It is an immature male, with the last molar not yet erupted. One 
of the skins from Taveta is mounted in the exhibition series. 
KOBUS ELLIPSIPRYMNUS THIK Matschie. 
1910. Kobus ellipsiprymnus Roosevett, African Game Trails, Amer. ed., p. 475; 
London ed., p. 487. (Not of Ogilby.) 
1910. Kobus ellipsiprymnus thikae Marscute, Sitz.-ber. Ges. nat. Freunde Berlin, 
p. 411. 1910. (Thika River, north of Dényo-Sabuk, south of Mount 
Kenia, British East Africa; type in Powell-Cotton collection at Quex 
Park, Birchington, Kent, England.) 
1912. Kobus ellipsiprymnus canescens LONNBERG, Kungl. Sv. Vet. Akad. Handl., 
vol. 48, No. 5, p. 160. 1912. (Northern Guaso Nyiro River, British 
East Africa; type in R. Nat. Hist. Mus., Stockholm.) 
1914. Kobus ellipsiprymnus thike RoosEveELT AND He .ter, Life-Hist. African 
Game Anim., vol. 2, p. 502. 
Specimens.—Ten, from localities as follows: 
British East Arrica: Fort Hall, 1 (Mearns); Juja Farm, 3 (K. 
Roosevelt, T. Roosevelt); Mtoto Andei, 1 (Heller); Nairobi, 1 (Tarl- 
ton); Neumann’s Boma, Northern Guaso Nyiro, 1 (T. Roosevelt) ; 
Northern Guaso Nyiro River, 1 odd skull (K. Roosevelt) ; Tana River 
2 odd skulls (McCutcheon). 
This race is distinguished from the last by its lighter color. Our 
single skin from the Northern Guaso Nyiro at Neuman’s Boma, 
which represents Lénnberg’s Kobus ellipsiprymnus canescens, seems 
quite inseparable from specimens from south of Mount Kenia. In 
the series from Juja Farm and vicinity are both lighter and darker 
specimens; some have distinctly lighter colored necks and faces than 
the specimen from Neuman’s Boma. 
A still paler form, Kobus ellipsiprymnus pallidus, has been described 
by Matschie’ from the Powell-Cotton collection; the type-specimen 
from Hal-be, on the Shebeli River, Italian Somaliland. Specimens 
from the lower Northern Guaso Nyiro River, especially in the neigh- 
borhood of Lorian Swamp, are frequently very pale, sometimes com- 
pletely white; but these individuals range in herds with animals of 
normal color, with which they breed. Several accounts of these 
white waterbucks have been printed. Mr. A. B. Peréival has written 
the following interesting note: ? 
Two very interesting examples of white waterbuck, male and female, both full 
grown, have recently been brought from the Northern Guaso Nyiro by Lord Gifford. 
1 Sitz.-ber. Ges. nat. Freunde Berlin, p. 410, 1910. 
2 Journ. East Africa and Uganda Nat. Hist. Soc., vol. 1, No. 2, p.110. 1911. 
57502—24—_8 
