﻿DESCRIPTION OF A NEW SUBSPECIES OF MONKEY 

 FROM BRITISH EAST AFRICA 



By N. HOLLISTER 



The identification of all the specimens of African monkeys of the 

 genus lately known as Cercopithecus* contained in the United States 

 National Museum collection, leaves a single series of specimens from 

 Lake Naivasha, representing the cethiops group, which cannot be 

 placed with any previously named form. The description of this 

 new subspecies is herewith presented, as the sixteenth paper dealing 

 with the results of the Smithsonian African Expedition under Col. 

 Theodore Roosevelt. 



LASIOPYGA PYGERYTHRA CALLIDA, subsp. nov. 



Type from south side of Lake Naivasha, British East Africa. Male 

 adult, skin and skull, U. S. National Museum No. 162843. Collected 

 July 21, 1909, by Dr. Edgar A. Mearns ; original No. 6859. 



General characters. — Darker colored than L. p. lutea or L. p. 

 johnstoni, with less yellow in coloration of the back. Rump, hips, 

 legs, and tail darker iron gray; black on hands and feet much more 

 extensive and pure, in adults reaching in an unmixed area beyond 

 wrist and heel. Skull long and narrow. 



Color of type. — Face and complete circle around lips pure black; 

 long mustaches of black ; brow band white, mixed with black above 

 nose. Whiskers long and full, completely covering ears ; bufTy-gray, 

 considerably mixed with black. Top and back of head mixed black 

 and buff ; nape and upper parts of body to rump mixed wood brown 

 and black, darker along dorsum and paler, more buffy, on sides. 

 Outer sides of arms mixed gray and black ; hands pure black to wrist. 

 Rump, hips, and outer sides of legs mixed gray and black, blending 

 with the more tawny color of back and sides; feet black to heel. 

 Tail above dark gray, with strong mixture of black, becoming darker 

 toward end, and with terminal six inches pure black above and the 

 tip black above and below ; under side, except near tip, gray with less 

 black than above. Bay spot under tail large and bright, extending 



1 For the use of the name Lasiopyga in place of Cercopithecus, see Elliot. 

 Bull. Amer. Mus. Nat. Hist., N. Y., Vol. 30, p. 342, December 21, 191 1. 



Smithsonian Miscellaneous Collections, Vol. 59, No. 3 



