32 



EINAR LONNBERG, 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 fe^male 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 C. a. caudatus but in G. 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 . f ig. 1 ) . The white mane is 

 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 



^ These measurements may be compared with the corresponding ones of G. a. caudatus communicated 

 by Cameeano Kicerche int. al Colohus ocddentalis Eochebe., p. 15 (II Euwenzori, Eel. scient.). 



Fig. 1. Young of Golobus ahyasinicua kikuyuensis. 



