KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 58. NIO 2. 33 



an der Innenseite und an dem Rande der Ohren nicht weiss, sondern rötlich-ocker; 

 Schwanz an der Unterseite ohne Weiss. » A single specimen from Rutshuru is said to 

 liardly differ from those from Wabembe. If the present specimens are examined with 

 regard to the colonr of the hairs on the ear the following is found. One of the males from 

 Rutshuru has a rather påle »reddish-ochre » tint on the tips of the hairs of the inside of 

 the ear. In another male the same may be traced. In one of the females a similar con- 

 dition is found, but in a still paler shade. In the male from Masisi the tips of these hairs 

 are slightly stained in a similar way, but in the female it is hardly discernible. In the 

 other specimens the hairs in question are white or whitish. This characteristic appears 

 thus to be subjected to variation and is not alone sufficient for distinguishing a 

 subspecies. 



Other specimens from the Ituri forest at Beni and Mawambi the author just quoted 

 has named »Lasyopyga schmidti ituriensis)). As, however, Matschie's subspecies Cerco- 

 pithecus schmidti enkamer has been collected at the same locality, »ituriensis» and »en- 

 kamer» without doubt are identical. As Matschie has given his name two years previ- 

 ously, 1 it must have priority before the other. The name ituriensis must thus give place 

 to enkamer. It remains, however, to decide whether Lorenz's subspecies montanus, can 

 be maintained, or with other words if the specimens from Rutshuru are racially distinct 

 from such ones from Beni. As the present collection only contains one specimen from 

 the latter locality it is very difficult to express any decisive opinion in this matter. The 

 only conspicuous difference between the present Beni specimen and the other ones is the 

 above mentioned aberrant colour of the tail. It is, however, uncertain, whether such a 

 difference in colour of this organ is constant, or not, the more so as the colour of the tail 

 is very variable in specimens from Rutshuru, although none of them has just this colour. 

 The variability of the colour of these Guenons in other respects as well has been set forth 

 above as f. i. with regard to the hairs on the ears, the hind legs, the shade of the yellow 

 rings on the hairs of the crown etc. It appears therefore difficult to base a subspecies on 

 the characteristic mentioned when the variation in colour is so common. 



Lorenz found the fur of the specimens from Wabembe 1 j 2 to 1 cm. longer than that 

 of the Ituri specimens. In the present male specimens from Rutshuru the fur is longer 

 than in the male from Masisi, but in the females from these localities it is about as long 

 as in the female from Beni, or about 4 cm. in all females. 



It is, however, not only the shades of colour which vary among these animals. The 

 same is the case with the dimensions of the skulls as the following table of measurements 

 proves, although in reality the differences are much more apparent to the eye at a direct 

 comparison of the skulls (Pl. VIII) than the figures of the table show. A comparison of 

 the general dimensions of these skulls with those recorded by Matschie (1. c. p. 30) for 

 his original specimens of enkamer prove, that the latter lie within the limits of variation 

 expressed below. 



It is of interest to note, that the large male n:o 23 (Pl. VIII, figs la & 2 a) has been 

 shot the same day, 28 / 9 1913, as the small male n:o 25 (Pl. VIII, figs. 1 b & 2 b) and the 



1 Ann. de la Soc. r. Zoologique et Malacologique de Belgique, Torne XLVII (1912), p. 29. 

 K. Bv Vet. Akad. Handl. Band 58. N:o 2. 



