4 ERYTAHROCEBUS 
GENUS IX. ERYTHROCEBUS. 
2—2 1—1 2—2 3—3 
Ne oss. ee ee) Pe es ee 
ERYTHROCEBUS Trouess., Cat. Mamm., Viv. et Foss., I, 1897, 
p. 17. Type, none designated. C. patas Schreber? 
Size large, limbs long, slender ; pelage mostly reddish; skin whitish 
or pale blue; face short; angle from forehead to lips abrupt; head flat 
on top; tail long; teeth moderate, except canines, which in the adult 
‘male are very long, curved and pointed; first two upper premolars have 
one outer and one inner cusp; molars with two outer cusps; second 
molar the larger; first lower premolar large and heavy. 
Unlike the members of the genus Lasiopyea those of the present 
are not arboreal in their habits, but are dwellers of the open country 
and the plains, and for travelling over such areas their long limbs are 
specially adapted. They go in small companies, and the various 
species appear to be quite local, and restricted in their ranges. Shy 
and watchful, they are very difficult to approach even within the 
reach of the long range rifles of the present day, and the animals 
easily, on the approach of danger, find concealment in the long grass 
that covers their accustomed haunts, and thus escape from their pur- 
suers. On this account specimens in collections are usually few, and 
there is no Museum that possesses a good representation of the vari- 
ous species, indeed, in many institutions, they are conspicuous by their 
absence, or by the presence of an example of the long known E. paitas. 
Of their food and habits in the wild state but little reliable informa- 
tion has been obtained except of FE. patas. They are very handsome 
animals, and considerably larger than the species of LasiopyGa. 
LITERATURE OF THE SPECIES. 
1775. Schreber, Die Sadugthiere in Abbildungen nach der Natur mit 
Beschretbungen. 
ERYTHROCEBUS PATAS first described as Simia patas; and in 
the volume of plates a figure given called S. rufa, which is 
undeterminable, no species like it being known. 
1788. Gmelin, Systema Nature. 
ERYTHROCEBUS PATAS (Schreb.), renamed Simia ruber. 
