I-^I 



with the area between the shoulders continuons with the upper 

 parts of neck and head, shoulders and arnis and ail thèse parts 

 absolutely jet black without a trace of a whitish tick as n" 1842 

 from Mawambi, not far from Béni. 



It is, however, not enough with tliis variation, there are also 

 spécimens which show the black crown of the head more or less 

 ticked. Thus a maie (n 1798) from Bolovet has a roundish spot 

 on the crown oi the head about 2 cm. in diameter, which is pro- 

 vided with pale rings on the hairs. The female n° 3313 from Béni 

 is sprinkled with light rings on the whole black crown and upper 

 neck. Concealed pale rings are also sometimes found an the black 

 hairs of the head. The gênerai grey shade of the colour of the 

 back is also varying, sometimes darker, sometimes paler. The 

 palest is a spécimen from Rutshuiu. The one which is most extre- 

 mely shiny jet black on the head and anterior parts and very dark 

 on the back, thus most typically « princeps » like, is a maie, while 

 those spécimens which are most ticked on the head are females. 

 I may thus express the opinion, that spécimens which exhibit the 

 most pronounced « prtjiceps » characters are those which hâve 

 reached the highest degree of progressive (masculine and orna- 

 mental) development, and the most speckled ones in a certain 

 sensé remain on an earlier stage. 



This nionkey appears to be an inhabitant of the great forest of 

 the Ituri district and adjoining parts, but also extending south- 

 wards to the forests at Rutshuru, but further south on the western 

 side of northern Tanganyika another subspecies appears to hâve 

 its home. There is in the Congo Muséum an interesting spécimen 

 (n° 873) collected in the vear iqio by Pauwels at Baraka. The 

 skull proves that it is an adult female. It is black on the intersca- 

 pular area, although sprinkled with pale rings to the hair there as 

 well as on the ciown of the head. The feet are black like the 

 fore legs, The thighs are darker than the back, the hairs of which 

 latter hâve the rings of the hairs a little yellowish, so that the gêne- 

 rai tone becomes somewhat olive. In addition to this the hairs on 

 the sides of the anus and on the hind margin of the thighs are 

 tipped, and partly ringed with dark brownish red. Thèse two latter 

 characteristics remind to some degree about Doggetti, and aven 



