136 ALLEN’S NATURALIST’S LIBRARY. 
Cibuella pygm@a, Gray, Cat. Monkeys Brit. Mus., .p. 64 
(1870). 
Characters.—F ace 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. 
Simia 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 (nec Kuhl); Wagner in Schreb., Saugeth., 
i, Pe 127s te 90 (tesa), sue Suppl. v.,p. 15;, tie 
(1855); Sel, P. 2.54 1875, p. 459, pl. |.; Schl, Mime 
Pays Bas, vii., p. 267 (1876). 
Midas argentatus, Bates, Nat. Amaz., 1., p. 162 (1863). 
