LASIOPYGA 359 



This remarkable monkey has been lately described by Dr. But- 

 tikofer (1. c). It differs from all the Guenons in the peculiar colora- 

 tion of the head and the narrow central hairy crest. The type, and 

 two living individuals, one in the Royal Zoological Gardens at Antwerp, 

 and one in the possession of Mr. L. Ruhe at Alfeld, are the only 

 examples known. 



Subgenus 7. Insignicebus. 



A conspicuous white collar about neck, sometimes present. 



KEY TO THE SPECIES AND SUBSPECIES. 



A. With white collar. 



a. Without ear tufts ; inner side of limbs white. . .L. albitorquata. 



b. With ear tufts. 



a.' Lower back dark ochraceous rufous and 



black speckled L. kolbi. 



b.' Lower back yellowish brown L. k. nubila. 



c.' Lower back burnt sienna and black speckled. L. k. hindei. 



B. No white collar. 



a. Aural region not red or reddish. 



a.' Tail not white on one third of length 

 beneath. 



a." Lower back speckled with ochra- 

 ceous and black, no red at root of 

 tail L. albigularis. 



b." Lower back speckled cream buff and 



black L. a. beirensis. 



c." Lower back speckled with reddish 



yellow, red at root of tail *L. a. kinobotensis. 



d." Lower back speckled with reddish 



orange and black L. ruHlata. 



e." Lower back speckled with reddish 



chestnut and black L. moloneyi. 



f." Lower back speckled with ochra- 

 ceous buff and black L. franccscce. 



g." Lower back speckled with reddish 



cinnamon and black L. preussi. 



*I cannot be certain that this is the proper place for this form. 



