COLO BUS 147 



92; Hensel, 50; intertemporal width, 44; palatal length, 50; median 

 length of nasals, 18 ; length of upper molar series, 32 ; length of man- 

 dible, 85 ; length of lower molar series, 42. Ex type British Museum. 



Herr Lonnberg, (1. c.) has described a Colobus from Escarpment 

 Station, British East Africa, under the name of C. a. kikuyuensis as 

 follows : 



"Closely allied to Colobus caudatus, Thomas, but smaller, with 

 the white tuft of the tail shorter and less developed, measuring only 

 44 cm. to the tips of the hair in a rather old male. The black of the 

 basal part of the tail e.xtending over 24-27 cm., thus longer than in 

 C. CAUDATUS. The young not white, as in C. caudatus, but nearly of 

 the same color as in the adult." 



Measurements. "Condylo-basal length of skull in a rather old 

 male 101 mm. (Ill mm. in C. caudatus) ; occipito-nasal length 91 mm. 

 (101 mm. in C. caudatus)." 



I have not seen any of Herr Lonnberg's examples of this Colo- 

 bus, and the above very brief description is all that is known of it. 

 Considering that the type locality of C. caudatus, is not so very far 

 removed from that of Herr Lonnberg's examples, and the considerable 

 extent of this part of East Africa in which C. caudatus is found, it 

 would seem unlikely that an allied form would be a resident of a por- 

 tion of the same district. It may also be remarked that the tufts of 

 the tails among different individuals of C. caudatus are not all of the 

 same length or thickness, and allowance should always be made for 

 individual variation that is generally met with. Dr. Allen (1. c.) men- 

 tions how the black on the tail varies in extent in specimens from Mt. 

 Kenia and Kyabe, British East Africa, collected by the Tjader Expedi- 

 tion. Variations in skull measurements also differ considerably some- 

 times. Herr Lonnberg gives but two, a condylar-basal measure- 

 ment, one not often given, and the other the "occipito-nasal length" 

 as 91 mm., while that of the type, as given above is 92 mm., not a 

 sufficient difference to require comment. The only other difference 

 mentioned by Herr Lonnberg is "the young not white as in C. cauda- 

 tus, but nearly of the same color as in the adult." I have examined a 

 great many examples of C. caudatus of all ages and from numerous 

 localities, and have no recollection of ever having seen a white one 

 either old or young, but the latter were always like the adult both in 

 color and its distribution. As I can find nothing in Herr Lonnberg's 

 description of his new form to warrant its separation from C. cauda- 

 tus I have placed his name among the synonyms. 



