136 ALLEN'S NATURALIST'S LIBRARY. 



Cibuella pygmcea, Gray, Cat. Monkeys Brit. Mus., p. 64 

 (1870). 



Characters. Face with long brown whiskers, naturally brushed 

 back over the ears ; ears small, with a few scattered hairs over 

 them, but no ear-tufts, sunk in the long fur of the head. 

 General colour brownish-tawny ; tail ringed with black. The 

 young resemble the adults from their earliest days. 



This is the most diminutive Monkey known, and measures 

 only six inches in length. 



Distribution. Forests of Brazil, extending north into Mexico. 

 Mr. Bates remarks in reference to this species : " I was surprised 

 on my return to England to learn that the Pigmy Marmoset 

 was found also in Mexico, no other Amazonian Monkey being 

 known to wander far from the great river plain. Thus the 

 smallest, and apparently the feeblest, species of the whole order 

 is one which has by some means become the most widely dis- 

 persed." 



Habits. Little or nothing is known of the habits of this in- 

 dividual species, but there is very little doubt that they agree 

 closely with those of the Common Marmoset. 



VII. THE BLACK-TAILED MARMOSET. HAPALE MELANURA. 



Simla argentata, Linn., Syst. Nat., p. 40 (1766), albino var. 

 Jacchus melanura, Geoffr., Ann. Mus., xix., p. 120 (1812); 



Gray, P. Z. S., 1865, p. 734. 

 Jacchus argentatus, Geoffr., t. c. p. 120. 

 Hapale melanura (nee Kuhl) ; Wagner in Schreb., Saugeth., 



i., p. 127, fig. 36 (1840), and Suppl. v., p. 15, fig. 13 



(1855); Scl., P. Z. S., 1875, p. 419, pi. 1.; Schl, Mus. 



Pays Bas, vii., p. 267 (1876). 

 Midas argentatus, Bates, Nat. Amaz., i., p. 162 (1863). 



