WATERBUCKS AND REEDBUCKS 497 



color averaging somewhat darker. From the 'Nzoia defassa 

 the Uganda race is readily distinguishable by its short pel- 

 age and absence of cinnamon sulTusion to tiic body colora- 

 tion, as well as by its hunger and more widely spread horns. 

 Dimensions of specimens in the Hesh are not available 

 for comparison, but those of the horns and skulls are abun- 

 dantly recorded. Skulls of old adults usually measure six- 

 teen inches in greatest length. The longest horns, as well 

 as those showing the greatest spread, recorded by Ward are 

 a pair shot by A. F. ji. Wollaston near Lake Albert Edward. 

 This pair has a length on the front curve of 36^ inches 

 with a spread of 36 inches. Several other heads of almost 

 equal dimensions are recorded from the same general local- 

 ity by Ward. The direction of the horns laterally, or the 

 amount of spread, varies greatly from specimens In which 

 it exceeds the length to ones having a spread only half the 

 length. As a rule, however, the horns are remarkably wide- 

 spread and exceed the horns of other races in this respect. 



Rudolf Defassa Waterbuck 



Kobus defassa matschiei 



Kohus unctuosus matschiei Neumann, 1905, Sitz. Ber. Ges. Nat. Freund. 

 Bcrl., p. 92. 



Range. — Northern shores of Lake Rudolf north through 

 the Rift Valley of southern Abyssinia as far as Lake Zwai. 



The defassa from the Lake Rudolf region and the Rift 

 Valley of southern Abyssinia has been named for Doctor 

 Paul Matschle by Herr Neumann from specimens which 

 he shot at Lake Abaya during his journey across Abyssinia 

 to the Sobat River in 1899. Some years earlier, Donald- 

 son Smith reported waterbuck on the north shore of Lake 

 Stephanie, and about the same time A. 11. Neumann met 

 with this race of the defassa on the northeast shore of Lake 

 Rudolf while elephant shooting. The race is distinguish- 

 able from, the ty[)Ical defassa of the highlands of Abyssinia 

 by its more grayish or drab coloration and by its much 

 shorter and thinner pelage, in which respect it approaches 

 the Nile defassa. It can, however, be distinguished from 

 the latter by its more cinnamon coloration. Judging by the 



