KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 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 
. . | 
ie < Colobus abyssinicus caudatus 
kikyuensis 
=a 4 
o'(old) | Qad. | o@ old co ad. | @ ad. 
Condylobasal length . 1... 6: sss +e: Pe ae Ome are 101 mm | 95 mm. | 111 mm. | 110 mm. | 93 
Basicranial Me ORR SNS. OR ee oe 92 » 86 » 99 » 100 / 83,5 » 
(EEE Gt SN BRERA ee a Re és, elle , 89 » 101 102 88,5 » 
Zygomatic breadth ........ dR tal Be iach Sail ke maine iv ® | .ou » 89» 92,5 75,5 
PPMCOMMECINCGMESW. aie ces ts res) She tee aes ee eel es 56 59» 62 65 » 61» 
PBHD ORLORDIUARE WIGGLE Date aes ets el et .| 43,5 » 50» 46 43,5 » 44» | 
Least interorbital width below the nasal bump........... 11,7 » D2 @eyl IAD ts LBW si (IA) 2 ' 
Breadth across middle of orbits ...... TO COE ae Oe 67,5 » 67» 78,5 76,5 » 66.5 
BET ODT HEAtS SUMO et cls aig sce) le eh sf use t 2. Sw eee 53» 48 » | 68 » 57» | 52 | 
PETS CANING LOLDEGE OL KI) «(6 ws os wie tes 6 8 el ee 41» 37,3 » | 44 » 44 » 40 
maneth Of upper molar Series... ss 8 is ms Hae Sas | 32 » 31} 34» 33,3 >» | 32,6 » 
Breadth of snout across last premoJar .... +. ++. +e ees 36 » | 33,4 > 39,2 » 38,8 » | 34,5 » 
Distance from ovcviput to middle of superciliary ridge... ... . 78,5 » 78,3 » 88 » 88,3 » 77,3 » 
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 (Pl. 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. 
K. Sv. Vet. Akad. Hand]. Band 48. N:o 5. 5 
