32 EINAR LÖNNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 
white mantle attain in the old male a maximum length at the shoulders of about 
28—29 cm. and in the sacral region about 40 cm. In the female the same measu- 
rements are resp. about 23, and 25—26 cm.! 
The most striking exterior difference 
between the Escarpment Guereza and 
that of Kilimanjaro is the difference in 
the development of the tail-tuft which 
in the latter is 15 to 30 cm. longer. This 
depends partly upon the fact that the 
tail-tuft begins where the white hair of 
the tail begin, and the black basal por- 
tion being longer in C. a. kikuyuensis 
causes the beginning of the tail-tuft to 
be removed further distally. But the 
Kilimanjaro Guereza has also longer hair 
in the tuft and at least often a longer 
tail (without hair), although its length 
is variable. Another difference lies there- 
in that the hair of the black region of 
the tail in most cases is basally white 
in OC. a. ceaudatus but in C. a. kikuyuensis 
it is as a rule entirely black or grey, 
although I have seen it whitish in one 
specimen. 
The young of C. a. kikuyuensis (Fig. 1) 
is entirely different from that of C. a. cau- 
datus which latter is white with a trans- 
verse triangular black patch on the head 
above the eyebrow stripe, and with 
blackish legs. A young Colobus from the 
forest at Escarpment exactly of the same 
size as the one from Kilimanjaro described 
above viz. about 23 cm. from the root 
of the tail to the vertex of the head in 
a straight line, and with the tail meas- 
uring about 24 cm. has almost the colours 
of the adult (conf. fig. 1). The white maneis 
not developed but foreshadowed by longer 
hair in the place where the mane shall 
be developed later. These longer hair are, however, mixed black and white. In the 
sacral region white hair with dusky tips predominate. The back is not pure black 
Fig. 1. Young of Colobus abyssinicus kikuyuensis. 
! These measurements may be compared with the corresponding ones of C. a. caudatus communicated 
by CAMERANO Ricerche int. al Colobus occidentalis RocHEBR., p. 15 (Il Ruwenzori, Rel. scient.). 
