168 ALLEN'S NATURALIST'S LIBRARY. 



I. THE THREE-BANDED DOUROUCOLI. NYCTIPITHECUS 



TRIVIRGATUS. 

 Aotus trivirgatus, Humboldt, Obs. Zool., p. 306, fig. 28 



(1811). 

 Nyctipithecus trivitjatus, Gray, Ann. Nat. Hist., x., p. 256 



(1842); id., Cat. Monkeys Brit. Mus., p. 58 (1870); 



Schl, Mus. Pays Bas, vii., p. 213 (1876). 

 Characters. Fur short, grey and brown, with a silvery lustre ; 

 on the crown of the head three long black linear streaks, distinct 

 from each other ; frontal spot whitish ; back greyish-brown 

 with a dark dorsal band and a long chestnut patch ; chest and 

 lower surface of body rusty-red ; throat, and inside of limbs, 

 greyish-ashy ; tail long, cylindrical, and with short, blackish- 

 brown hair, more yellow on the under surface of the base. 

 Length of the body, 12 inches; of the tail, 14 inches. 



Distribution. The type specimen was obtained by Humboldt 

 on the banks of the Cassiquiare, near the head waters of the 

 Rio Negro. Mr. Bates found it at Ega and atXrther places on 

 the Upper Amazon region. It has been recorded also from 

 Guiana ; and from Chanchamayo in Peru, at 3,000 feet above 

 the sea. 



Habits. The habits of the Three-banded Douroucoli are 

 entirely nocturnal. They hide in small troops in a hole in the 

 trunk of a tree from morning till twilight, hunting for food during 

 the night. They have a singularly loud and far-reaching voice 

 for such small animals. 



II. THE LEMURINE DOUROUCOLI. NYCTIPITHECUS 

 LEMURINUS. 



Nyctipithecus lemurinus, Is. Geoffr., Arch. Mus., iv., p. 24, pi. 

 21 (1844); Gray, Cat. Monkeys Brit. Mus., p. 58 (1870). 



