164 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 
Waterbucks were seen near Lekiundu river, and on both sides of Guaso Nyiri 
from the ford on the Marsabit road to some distance below Chanler Falls. Often 
5 to 8 or more cows and immature animals were seen together but no buck. At 
other opportunities single bucks, or a few bucks in company were observed or a 
buck with some few cows. They were always found near the river, but often on very 
bad and stony ground. They were not very shy. When first observed close to the 
river they usually took their refuge to higher ground and trotted up on stony hills with 
great dexterity. The grey fur harmonized completely with the grey, leaf-less bush 
but they were, of course, very easily seen as they did not try to hide and their 
contour-lines always betrayed them. They have a more deer-like and stately carriage 
than any other antelope, because they hold head and neck high. 
Redunca sp. 
At two different opportunities not far from Nairobi I saw a Reedbuck, but it 
was on private ground where I had no right to shoot, so that I could not ascertain 
which species it represented. 
Aipyceros melampus rendilis n. subsp. 
In the thornbush country north of Guaso Nyiri I collected the material of 
Impala Antelopes which I was entitled to by my licence viz. 4 specimens and selected 
two good bucks (Pl. XIV fig. 3), a young buck with still almost straight horns (Pl. 
XIV fig. 4) (m*® not yet up), and a female. When [ had come home and compared 
my material with specimens from Kilimanjaro (collected by Ss6stepT) which must 
be regarded as representing A. m. suara MartscuiE I found that the difference in 
colour is quite conspicuous. My specimens are irrespective of age and sex alike and 
much darker than the Kilimanjaro specimens which display a much redder general 
colouring. 
The general colour of the back of the Guaso Nyiri race is »fawn» (Rep. de 
Couleurs 308.4 in ¢, 308.3 in 2), and darkens in the bucks on the posterior back to 
»madder brown» (Rep. de Coul. 334.4). In contrast to this the colour of the Kili- 
manjaro specimens is the same shade as »dead leaf» (Rép. de Coul. 321. 3 & 4) but 
brighter. The line of demarcation in the Guaso Nyiri specimens is quite sharp, and the 
colour of the sides is »dark fawn» (Rép. de Col. 307. 1), while the colour of correspon- 
ding parts in the Kilimanjaro specimens is »buff» (Rép. de Coul. 309. 1). The white 
above the eye, on the chin and throat is similar in both races. Below and in front 
of the eye, below the continuation of the white eyebrow-stripe there is in the Guaso 
Nyiri specimens a blackish, not sharply defined but well visible patch which I have 
not seen in a buck from Kilimanjaro, but which may be faintly traced in a ewe from the 
same place. (The authors of the »Book of Antelopes» say that this patch »is never 
present in northern» specimens, and it may thus be of some importance.) The black 
