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Show 394 MR. O. THOMAS ON MAMMALS FROM ECUADOR. [May 4, Andoas, on the Pastasa river, 70 miles below Sarayacu. September 1878. Intac, 50 miles N. of Quito. July 1877. Pallatanga, 50 miles S.W. of Riobamba. Balzar, on the Palenque river, 70 miles north of Guayaquil. The specimens from Balzar were collected by Mr. Illingworth, all the remainder by Mr. Buckley. I. MYCETES SENICULUS, Linn. Seven specimens from the Copataza river. 2. MYCETES NIGER, Geoffr. M. niger (mas) and M. stramineus (fem.), Geoffr. Ann. Mus. xix. p. 108. Simia caraya, Humboldt, Recueil, p. 255, no. 11. One specimen from Intac. This Intac specimen, of which, unfortunately, the sex cannot be determined, agrees exactly with Humboldt's original description of the female of his Simia caraya, which he describes as having a black head and back, while the sides and belly are yellow. In all recent descriptions, however, the male is described as being nearly uniformly black, and the female uniformly yellow; but this appears to be just such an intermediate specimen as Humboldt has described. On the other hand Prof. Schlegel1 mentions that adult males sometimes have the black on the hands and feet mixed with yellow : so that, if our specimen is a male, it may represent merely an extreme phase of this variation. Mycetes palliatus, to which this specimen bears a certain resemblance, is only found in Central America2, and differs in the length of the hair and in the detailed distribution of the colours. 3. LAGOTHRIX INFUMATA, Spix. Five specimens, Copataza river. 4. NYCTIPITHECUS TRIVIRGATUS, Humb. Five specimens, Copataza river. 5. PITHECIA MONACHUS, Humb. Nine specimens, Copataza river. 6. CALLITHRIX CUPREA, Spix. Twelve specimens from the Copataza river, and one from Andoas. The Andoas specimen, which is a male, differs from the rest in having the fur on the back of a dirty orange-grey colour, without annulations, instead of being of a bright annulated black and white. One of the others, a female, shows a tendency to this condition of the hair, which is therefore very probably a seasonal change, as the Andoas specimen was shot in September, while the others were obtained between December and February. 1 Monogr. Singes, p. 149. 2 Cf. Alston, Biol. Cent. Am., Mamm. p. 4. |