KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0O 5. 33 
as in the adult because greyish white hairs are mixed with the black. The same is 
the case with the upper portion of the tighs. Other parts are coloured as in the 
adult. 
| Colobus abyssinicus 
je : | Colobus abyssinicus caudatus 
kikyuensis S 
= = 
| 3 (old) 2 ad. | FS old | & ad. 2 ad. 
| | 
Condylobasal length | 101 mm | 95 mm. | 111 mm. | 110 mm. | 93 
Basicranial » 92 86 >» 904 100 > 83,5 
Occipitonasal >» BT SET BAS OR SR SS TSE RR EEE ADA | 91 » | 89 » |101 102 88,5 
YEO S01CE DIOR ULUDIN NE sr sl les ste le is eler allel ef e Hide enes | 79 » 80 oo» 89 >» 92,5 » | 75,5 
Brosetbombrancaset AGNE. FTNINTÖ: I00L fon cm Ira M62 Gstesrillen ts 
Weastipastorbitalkvwrdtlr. Ste ste CDR ELI: al 43,5 » | 507 3-46 43,5 > Raa | 
Least interorbital width below the nasal bump. . . » -« = = + . . « | I MN 112 | 14,2 » 15 | 124.020 
Breadtolacrossimiddletöf Orbits: <-st: sla did sne sn re se) ÖT 67 78,5 76,5 66,5 
Hon Sth Ofipalatermesially ch. tsk so. ekfsL så el sd (dc. eten sf oe ES DS LR 48 >» 58 oo» 57 52. » | 
IFOR bTOfKcANINe: GOLNaCk Of My cc os sis 6 «s s ers Äseal 4 37,3 » 44 44 oo» 40 
| FHOnStikoftupper mOlarsOPIGSIE sr...  kelus ENG Fe SL Ms eV ll DA KR SN 34 oo» 33,3 > 32,6 » | 
Breadth of snout across last premolar . . . . . . . « SANNE EG re 33,4 2» | 39,2 » 38,8 34,5 | 
Distance from oceiput to middle of superciliary ridge . . . . . . . | 78,5 » 178,3 88 >» 88,3 71,3 > 
The measurements above prove that the males of the Kilimanjaro Guereza 
have considerable larger skulls in every respect than the Escarpment Guereza. The 
difference between the female skulls is, however, less apparent, and some dimensions 
may even be larger in the Escarpment Guereza. That female animals of two geo- 
graphic races are rather similar while the males are very different is a common 
occurrence. That the Kilimanjaro Guereza belongs to a larger race is among other 
things indicated by the teeth being, even in the females, larger than those of the 
Escarpment animals. In the former the ridge above the orbits (the eyebrow-ridge) is 
less prominent and situated lower down when compared with the vertex of the skull 
than in the latter. The profile contour of the Escarpment Guereza (PI. I, fig. 1) is 
therefore much more evenly sloping than in the larger race. This difference is well 
visible in the females as well. 
The forest inhabited by the new race of Guereza is partly not very thick, but 
the undergrowth consisting of tall herbs, bushes and small trees is very thick in such 
places where the big trees stand a little apart. In the early morning the males 
were heard producing the same humming or buzzing noise (something like »brrm 
brrrm> long continued) as has been described for other Guerezas. When in compa- 
ratively low trees this monkey hastens to escape, but in high trees it often thinks 
itself safe, and it can hardly be termed very shy. For a person who has a little 
time to spare it is easy to shoot the 6 specimens which are permitted by the shooting 
license, and this number is far too great to afford sufficient protection for the spe- 
cies, if it should become fashionable among sportsmen to secure their full allowance 
of Guerezas in the Escarpment forests. 
EK. Sv. Vet. Akad. Handl. Band 48. N:o 5. 
[ST 
