28 



EINAR LÖNNBERG, MA MM ALS COLLECTED IN CENTRAL AFRICA. 



area. This variation appears, however, to be independent of locality . It is not impossible 

 that the Colobus monkeys living near Rutshuru, in consequence of loss favorable alimen- 

 tary conditions there, constitute a somewliat smaller, less well nourished race than those 

 in the great forest at Beni, but undoubtedly analogous conditions are to be f ound in other 

 localities as well. The quite young specimen of this collection, mentioned above has 

 already the colour pattern of the adult, although the white mantle fringe is very scantily 

 developed. On the back the under fur is greyish. The length of head and body of this 

 skin is 335 mm. 



In spite of the somewhat greater dimensions of the skulls from Beni, as mentioned 

 above, the capacity of the brain-cavity is fully as large in those from Shasha, Rutshuru. 

 The capacity of three male skulls from Beni is resp. 77, 78 and 80 ccm., while the same 

 of two skulls from Rutshuru have this mcasurement resp. 79 and 81 ccm., thus practi- 

 cally the same. 



It might be possible that the subspecies Colobus occidentalis ritfshuricus, which 

 Lorenz has established 1 , might be maintained in consequence of the somewhat smaller 

 dimensions of the skull as mentioned above. The characteristics of the tail, however, 

 which Lorenz quotes do not hold good. 



The second race, which Lorenz has named C. occ. ihiricus 2 , from Mawambi is 

 said to differ from C. occidentalis Rochebrune »durch das Fehlen einer längeren 

 ►Schwanzquaste». This might partly be individual, partly seasonal. The long hairs 

 of the tuft of the tail may bo worn off. Among the males from Beni in the present 

 collection one has the white hairs so much worn that they hardly form any tuft, the 

 others have very well developed tufts. 



Colobus ellioti Dollman. 



2 c^cT (n:o 202 & 203), 1 ? (n:o 204), from the forest about two days west of Beni, 

 Aug., Sept. 1914; 2 dV ad. (n:o 239 & 242), 1 d* juv. (n:o 241), from Beni, Jan. 1914. 



Dir. Lorenz von Liburnau had received a series of more than 30 specimens of 

 red Colobi from the Ituri forest, and on this material he based a species which he na- 

 med »Colobus variabilis» in consequence of its great variability. This took place in 

 the year 1914. 3 In the same year Prof. Matschie named a red Colobus from Ituri 

 between Irumu and Beni Piliocolobus ellioti melanochir. It appears rather possible that 

 the latter is included in the former. Two of the specimens recorded above, n:o 241 & 242, 

 agree with Matschie's melanochir with regard to thcir »Biischel silbergrauer Haare hin- 

 ter den Ohren» and the whitish grey lower side, but at the same time they agree in some 

 respects with Lorenz's group »d» of variabilis, which also is said to have »verlängertes 

 Haar hinter den Ohren silbergrau». The crown of the head behind the black frontal 

 band is »fawn» (Dauthénay, Rep. de Coul. 308, 3 & 4). The shoulders and upper parts of 

 the arms are a little paler (308, 2 & 1). The nape is darker than the crown, inclining to 



1 Anz. d. K. Akad. d. Wiss. Wien, Jabrg. LI. 1914, p. 508. 



2 1. c. 



a Anz. d. K. Akad. d. Wiss. Wien, Jahrgi LI, 1914, p. 383. 



