40 CEBIDiE. 



3. Mycetes bicolor. The Black-and-yelloiv 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. II. 1845, xvi. p. 214! 



Ilab. Brazil. 



Like M. seniculus. Dr. Slack thinks this may be the same as 

 M. iiisinus. 



See Aluatta nigra, Journ. Acad. Phil. 18G2, 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." 



Ilab. Brazil ; Paraguay. 



4. Mycetes laniger. The Silly 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 closo underfur ; hair of the head rather 

 elongate. Males and females. 



Mycetes laniger, Gray, Ann. $• May. N. II. 1845, xvi. p. 214! 



Var. End of tail paler. 



Stentor chrysurus, Is. Geoff'. May. Zool. iv. t. 7. 



Ilab. Columbia. 



Dr. Slack (I. 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 tho 

 sides elongate, brownish yellow, forming a kind of mantlo on each 

 side. 



Mycetes palliatus, Gray, P. Z. S. 1848, p. 138, t. G ! M. Beelzebul, 

 Scliott, Mitteler Report, 1802, p. 413. Aluatta palliata, Slack, 

 Journ. Acad. Phil. 18G2, p. 510. 



Hab. Cai'accas, Salle. 



** Forehead ivith the hair directed forward ; crown smooth, with radiating 



hairs. 



6. Mycetes auratus. The Red- and-yelloiv 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. 8f May. N. II. 1845, xvi. p. 220 ! 

 Ilab. Brazil. 



