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 dispersed."
Habits.—Little or nothing is known of the habits of this individual 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., Säugeth., i., p. 127, fig. 36 (1840), and Suppl. v., p. 15, fig. 13 (1855); Scl., P. Z. S., 1875, p. 419, pl. l.; Schl., Mus. Pays Bas, vii., p. 267 (1876).
Midas argentatus, Bates, Nat. Amaz., i., p. 162 (1863).
Mico melanurus, Gray, Cat. Monkeys Brit. Mus., p. 64 (1870).
Hapale argentata, Schl., Mus. Pays Bas, vii., p. 268 (1876).