EAST AFRICAN MAMMALS IN NATIONAL MUSEUM. 25 
forms of this monkey are apparently rather local, and specimens are 
difficult to secure. Until very recently almost all of the specimens 
in museums were animals which had died in zoological gardens, with 
the exact locality of capture unknown. A species of this group was 
described by Matschie from Ikoma, German East Africa, as Erythro- 
cebus baumstarki.1 While in Berlin, Heller made the following notes 
on the type-specimen: 
Erythrocebus baumstarki Matschie. Type, ¢, A5575, Berlin Mus. Ikoma, German 
East Africa. Skull immature, last molar just up, all molars unworn, sutures all open. 
Skin stuffed; color pale, middle dorsal streak sorrel, sides ochraceous, underparts of 
belly and legs whitish. Hair on face slipped and color can not be made out. 
The specimen listed above from Uganda in no way agrees with the 
description of Elliot’s Erythrocebus formosus and is here provisionally 
placed under #. whiter. As already mentioned, the type of formosus, 
said to come from “Uganda,” is a zoological park animal and its 
color is doubtless abnormal. Mr. Heller considers formosus a synonym 
of poliophzus. The intensity of color and the degree of dark shoulder 
markings in hussar monkeys are largely matters of age, and there is 
known to be considerable variation in the extent of the dark facial 
stripes. The specimen shot by Colonel Roosevelt below Nimule has 
a darker face than typical specimens of Hrythrocebus whiter from the 
Guas Ngishu Plateau, the skin surrounding the mouth being espe- 
cially blackish; but it has a white-haired nose-spot. It also has the 
black border of the crown-patch less distinct, almost wanting, and 
the arms more marked with iron gray, the color extending slightly 
below the elbow. These differences are in reality very slight and 
the Nimule specimen may, considering the known variations in 
monkeys, well be of the same form as the Guas Ngishu animal. 
The skulls of the four hussar monkeys listed above measure as 
follows: 
Guas Ngishu Plateau. Nimule. 
| 
|- : . 
155340, 173010, | 173009, 164684, 
male,type. male. female. male. 
: | z 
PARED PAC) y LEN TTS 1a Se a a fe | 149 130 147 145 
Garrrepie SAMENESS cer ao nes cakes aen anes 120 104 118 114 
Zygomatic breadth................... Sea PA ar ee SAC 99 8 | 84 91 
Letigth of nusals| (median) -. 22 2s02.0 2 occ sees 22.5 21.3 27.2 24.8 
MMiemoiiroad tit $2 < .s Cet oud) 2 settee, Sash 72:7 65.5 69.8 72.8 
Rostral breadth, over canines...............222eeee-ee- | 38.8 35.9 | 38.8 | 37.1 
PalneOlinOPel 6 eho Sak dock vas < eee aces ea | 63.2 50. 2 62.2 | 58.3 
Resapein eh entgtAS oie” 5 de en cede | 108 93.7 106 103 
Maxillary tooth row, exclusive of canine................ | 32 30.7 | 32 31.8 
Mandibular tooth row, including canine................ | 50.3 45.1 | 49.3 49.6 
1 Sitz.-ber. Ges. nat. Freunde Berlin, 1905, p. 273. 
57502—24—_ 3 
