Dr. J. i. Gray on new Species of Callithrix. 57 
V.—Notice of some new Species of Callithrix in the Collection of 
the British Museum. By Dr. J. HE. Gray, F.R.S. &e. 
THERE 1s perhaps no genus of American Monkeys that appears 
more difficult to distinguish than the beautiful group of small 
Monkeys named Callithriz. There is a large series of them in 
the British Museum, and among them there are two specics 
which do not as yet appear to have been noticed in the Cata- 
logues. 
Count Hoffmansegg described two species many years ago. 
Spix has figured five ; but two of the figures are so badly coloured 
that, if it were not for the description, one might doubt which 
species they were intended to represent. M. I. Geoffroy has 
figured two; but his figures have the defect of over-brightness, 
as Spix’s have that of dulness. 
The species in the British Museum may be thus arranged :— 
1. The fur soft, with abundant, elongated, stiffer hairs. 
a. The hands and feet red. 1. C. cuprea, Spix, t.17 = C. 
discors, Geoff. 
b. The hands and feet whitish. 2. C. donacophila, D’Orb.; 
3. C. Moloch, Hoffm.; 4. C. ornata, n. sp. 
c. The hands white, the. feet black. 5. C. amicta, Geoff. ; 
6. C. torquata, Hoffm. 
d. The hands and feet black. 7. C. personata, Geoff.; 8. C. 
nigrifrons, Spix, t.15; 9. C. castaneoventris, n. sp. 
The second series consists of the species which have only a 
soft woolly fur and the hands and feet black—as (10) C. melano- 
chir, Geoff. Paris Mus. Cat., (11) C. gigo, Spix, t. 18: but of this 
group unfortunately there is not any specimen in the Museum ; 
and they cannot be the young of the other species, as there are 
several young specimens of the first group in the Museum, and 
they have the longer bristly hairs of the adult animal. 
This separation of the species by the colour of the hands 
may appear to be very artificial; but the hands of the different 
specimens from the same locality do not vary, while there is 
often a considerable variation in the depth of the colour in the 
other parts of the fur. 
Callithrix ornata, n. sp. 
Fur black and grey, punctulated; forehead and ears white ; 
temple, cheeks, throat, underside of the body, and mner side of 
the legs bright red chestnut; hands and feet grey; tail black, 
grey-washed; hair of tail pale, with a broad subterminal 
ring. 
Hab. New Granada. 
Received from M. Verreaux as C. discolor of I. Geoffroy; but 
