Habits.—Nothing is known of the individual habits of this species.
IX. THE YELLOW-TAILED TAMARIN. MIDAS CHRYSOPYGUS.
Hapale chrysopyga, Wagner, in Schreb. Säugeth., i., Simiæ, p. 249 (1840); Schl., Mus. Pays Bas, vii., p. 254 (1876).
Characters.—Similar to M. fuscicollis. Black, with the thighs, legs, and base of tail rusty-red.
Distribution.—Brazil, near Ypanéma, Province of St. Paulo.
X. THE BLACK AND RED TAMARIN. MIDAS NIGRICOLLIS.
Midas nigricollis, Spix, Sim. et Vespert. Bras., p. 28, pl. 21 (1823).
Midas rufoniger, I. Geoffr. et Deville, C. R., xxvii., p. 499 (1848); Is. Geoffr., Cat. Méth. Primates, p. 64 (1851); Castelnau, Expéd. Amér. Sud, pl. v., fig. 3 (1855); Gray, Cat. Monkeys Brit. Mus., p. 67 (1870).
Hapale nigricollis, Schl., Mus. Pays Bas, vii., p. 264 (1876).
Characters.—Differs from M. fuscicollis in having the back, loins, thighs, and legs bright reddish-chestnut. (Gray.) Mouth bordered with longish white hairs.