_Nyctipithecus rufipes_, Sclater, P. Z. S., 1872, p. 3, pl. 1.
_Nyctipithecus vociferans_, Spix, Sim. et Vespert. Bras., p. 25, pl. 19
(1823; part); Schl., Mus. Pays Bas, vii., p. 214 (1876; part).
(_Plate XV._)
CHARACTERS.--Above grey, slightly washed on the back with rufous; under
side reddish fulvous; three vertical black stripes on the head, similar to
_N. trivirgatus_, but much less distinct, narrower, and showing a prominent
triangular white patch over each eye; ears large and prominent, almost nude
(perhaps the result of captivity). Hands and feet rufous; tail
short-haired, cylindrical; the basal half rufous, the remainder
reddish-black. Length of the body, 11 inches; and of the tail, 16 inches.
The absence of the long chestnut patch on the back distinguishes _N.
rufipes_ from _N. trivirgatus_, and its paler colour and the indistinctness
of its head-stripes, separate it from _N. felinus_.
DISTRIBUTION.--Nicaragua; San Juan del Norte.
{170}IV. AZARA'S DOUROUCOLI. NYCTIPITHECUS AZARÆ.
_Simia azaræ_, Humb., Obs. Zool., p. 359 (1811).
_Pithecia miriquouina_, Geoffr., Ann. Mus., xix., p. 117 (1812); Kuhl,
Beitr., p. 43 (1820).
_Nyctipithecus azaræ_, Schl., Mus. Pays Bas, vii., p. 212 (1876).
CHARACTERS.--A large rhomboidal black patch between the two large
superciliary spots, the two acute angles of which are prolonged, the one
under the base of the nose, the other in the median line to the top of the
head; the inner side of the limbs, the under side of the body, throat, and
chin of a reddish-ochre colour.
DISTRIBUTION.--The right bank of the River Paraguay, in the north-east of
the Argentine Republic, but not in Paraguay proper.