40 CEBID. 
3. Mycetes bicolor. The Black-and-yellow Howler. B.M. 
Black ; hair rather rigid, uniform ; sides of the loins varied with 
yellow; hairs of this part black, with a broad subcentral reddish- 
yellow band. Male. 
Mycetes bicolor, Gray, Ann. §& Mag, N. H. 1845, xvi. p. 214! 
Hab. Brazil. 
Like M. seniculus. Dr. Slack thinks this may be the same as 
M. ursinus. 
See Aluatta nigra, Journ. Acad. Phil. 1862, 518. ‘Male deep 
black; hairs of occiput directed forwards, meeting at right 
angles those of the forehead, which are directed backwards. 
Female and young pale straw-colour, dashed with black.” 
Hab. Brazil; Paraguay. 
4, Mycetes laniger. The Silky Howler. 
Reddish chestnut ; middle of the back golden yellow; hairs elon~ 
gate, very soft and silky, dark brown at the base, golden or chest- 
nut at the tip, with a close underfur; hair of the head rather 
elongate. Males and females. 
Mycetes laniger, Gray, Aun. §& Mag. N. H. 1845, xvi. p. 214! 
Var. End of tail paler. . 
Stentor chrysurus, Is. Geoff. Mag. Zool, iv. t. 7. 
Hab. Columbia. 
Dr. Slack (J. c. p. 517) considers this undoubtedly the same as M. 
seniculus. 
5. Mycetes palliatus. The Mantled Howler.  B.M. 
Black brown ; hairs of the middle of the back and upper part of 
the sides yellow brown, with black tips; of the lower parts of the 
sides elongate, brownish yellow, forming a kind of mantle on each 
side, 
Mycetes palliatus, Gray, P. Z. S. 1848, p, 188, t.6! M. Beelzebul, 
Schott, Mitteler Report, 1862, p. 418, Aluatta palliata, Slack, 
Journ, Acad, Phil, 1862, p. 510. 
Hab. Caraccas, Sailé, 
** Forehead with the hair directed orward ; crown smooth, with radiating. 
airs. 
6. Mycetes auratus. The Red-and-yellow Howler. B.M. 
Dark red chestnut-brown; back and sides golden yellow; hairs 
rather short and rigid, dark at the base; beard darker. Female? 
Mycetes auratus, Gray, Ann. & Mag. N. H. 1845, xvi. p. 220! 
Hab. Brazil, 
