270 SYNOPSIS or THE SIMIADJB. 



p. 95. Simia aurita, Humb. Obs. Zoo/, i. 356. Hair 

 black, mixed with brown ; tail tinged with black and gray ; 

 a white spot on the forehead ; long white hair hides the 

 interior of the ears ; young hrown ; the adult markings 

 obscure. Inhabits Brasil. 

 Nos. 2 and 4 are much allied to H. vulgaris . 



5. H. HUMERALIFER, White-shouldered Ouistiti. Ouistiti 

 camail, Jacchus humeralifer, Geoff. Ann. du Mus. xix. 

 p. 120 ; Desm. Mamm. p. 95. Simia hurncralifera, 

 Humb. Obs. Zoo/, i. 365. Hair brownish-chestnut ; tail 

 slightly tinged wfth gray ; shoulders, breast and arms, 

 white. Inhabits Brasil. 



6. H. ARGENTATUS, The Mico. Simia argentata, Linn. ; 

 Humb. Mico. Audeb. Ouistiti mico, Jacchus argentatus, 

 Geoff. Ann. du Mus. xix. p. 120 ; Desm. Mamm. p. 

 94. Hair shining, entirely white ; the tail black ; face 

 and hands deep flesh-colour. Inhabits Para. 



According to Kuhl the tail is sometimes white. 



7. H. ALBIFRONS, White-fronted Ouistiti Ouistiti a front 

 blanc, Jacchus albifrons, Desm. Mamm. Supp. p. 534. 

 Hair black; white at the roots; face black; forehead, 

 sides of the neck and throat, clothed with short white hair ; 

 hair of the occiput and behind the ears long and black ; tail 

 brown, slightly varied with white. Native district un- 

 known. 



8. H. MELANURUS, Black-tailed Ouistiti Ouistiti melanure, 

 Jacchus melanurus, Geoff. Ann. du Mus. xix. p. 120. ; 

 Desm. Mamm. p. 94. Simia melanura, Humb. Obs. Zoo/. 

 i. p. 365. Hair brown above ; beneath yellowish ; tail of 

 a uniform black. Inhabits Brasil, Humboldt. 



Probably forms the passage to the next genus, Midat. 



GENUS XXV Midas, GEOFFROY. 

 Muzzle short ; facial angle 60 : forehead appearing prominent, 



