KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:O 5. 165 
patch on the crown is present in both races. The colour of the face is fawn with 
a dusky blaze in the Guaso Nyiri race (Pl. XIV fig. 3), more bright rufous in the 
Kilimanjaro specimens. The colour of the outside of the ears is »dark fawn» in my 
specimens, »buff» in those from Kilimanjaro, the terminal portion is black in both. 
The mesial dark dorsal streak is in consequence of the general dark colour not very 
apparent before it becomes black on the rump, and it is continued on the tail, where 
it, however, is concealed in the bucks by the long white hairs on the terminal por- 
tion of this organ. The black stripes on the buttocks, and the black tufts on the 
hind legs are developed as usual. The black spots as well on fore as hind legs in 
the place where the lateral hoofs are situated in other antelopes, and the black spot 
on the heel are perhaps more pronounced than in the Kilimanjaro race. 
These differences in colour between the Impalas from Guaso Nyiri and Kili- 
manjaro are also supported by cranial differences as the following measurements 
indicate. 
Guaso Nyiri Kilimanjaro | 
SHS sm fr sr AE 
| | 
| mm. | mm. | mm. | mm. | min. 
Basicranialflongbhil sg. id:sada dose IV SAR bok dj leker 245 254 | 257 = ol 242 
Condylobasalllenstbis Cu = LE dt Le foder IRS nt REA 260 274 272 258 
Erde nn ST a oa forte oa At gnee 108) | 114: | 118,3 <=X|, 104 
Interorbital breadth . . . . . .. . . SE PR IE TORK ESSEN f Sod ora rg RE 71 | 74 NORA Tål 
Greatest length of nasals . . ....... SG SNOK SONENS SES JOEL SEO 1.100 99 | 8 83 
Greatest breadth of nasals . . . . . BORT ol är AL BE CJ IE 7 [USE TE TA EE 
Breadth of nasals at the end of the nasopremaxillary suture. . .. . . -. . . « 21 er no 20 20 
Distance from orbit to tip of premaxillary . . - SK SEEN FMTS FLAFAL offset styket.e sön MOR 169 170 | 159 | 160 
Fengthiom upper imolar.somoskAnd. ou OIL. OM - EJ BOURNE JURA) SO 5 ST |; GSE SON kt76t an 
The length of the horns of my two Impala bucks, which are to be regarded 
as good average specimens, measure about 73 and 66 cm. along the front curve and 
the distance from tip to tip is resp. 43 and 53 cm. 
The Impalas of German East Africa appear to be smaller with shorter and 
especially narrower nasals. The difference is not very great, but I think it is the 
best proceeding to name the Impala of the thornbush country north of Guaso Nyiri 
as a separate geographic race which is called rendilis after the nomadic tribe inha- 
biting this country. Concerning the colour it could almost have been expected that 
the inhabitants of this arid region should have been paler instead of being rather 
darker. 
1 The spread of the horns is, as is well known, very variahle, and sometimes one of the tips is nearer 
the median line than the other. A good example of this was an Impala which I saw in Nairobi and which probably 
was from Sotik. The spread of this was not less than 68 cm., but the tip of the right horn was only about 
25 cm. from the median line. — Some ultramodern zoologists would probably term such a specimen a hybrid! 
