394 MR. O. THOMAS ON MAMMALS FROM ECUADOR. [May 4, 



Andoas, ou the Pastasa river, 70 miles below Sarayacu. Septem- 

 ber 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. 



1. Mycetes seniculus, Limi. 



Seven specimens from the Copataza river. 



2. Mycetes niger, GreofFr. 



M. niger (mas) and M. stramineus (fem.), Geoffr. Ann. Mas. 

 xix. p. 108. 



Simia caraya, Humboldt, Recueil, p. 2.55, no. 11. 



One specimen from Intac. 



This Intac specimen, of which, unfortunately, the sex caunot 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. Schlegel' mentions thatadult 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 resem- 

 blance, is only found iu Central America", 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 

 anuulations, 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, 



* Monogr. Singes, p. 149. ^ Cf. Alston, Biol. Cent. Am., Mamm. p. 4. 



