of the Gudcharo in S. America. 337 



In Ecuador Buckley obtained an example of Steatornis at 

 Sarayacu, on the Bobonassa, a confluent of the Pastaza. 



In Peru Steatornis was first noticed by Prof. Steere 

 (P. Z. S. 1878, p. 139). It was subsequently found by Rai- 

 mondi in the Grotto of Niilabamba, in the department of 

 Caxamarca, and at Tingo Maria, in the department of 

 Huanaco. The well-known collectors Jelski and Stolzmann 

 found it also in other localities in the departments of Junin 

 and the Amazonas (Taczanowski, Orn. Per. i. p. 200). 

 M. Stolzmann has published an interesting paper on this 

 subject (Bull. Soc. Zool. France, v. p. 198). 



It appears therefore that Steatornis occurs in various loca- 

 lities in Trinidad, Venezuela, Colombia, Eastern Ecuador, 

 and Peru, where there are caverns suitable to its extraor- 

 dinary mode of life and habits. 



I cannot ascertain that Humboldt ever gave the name 

 Caprimulgus steatornis to the Guacharo, as is commonly 

 alleged*. In the volume of the ' Journal de Physique/ 

 usually quoted to this effect, he merely refers to it as a 

 species of Caprimulgus f. 



The following list embraces, I believe, the principal re- 

 ferences to this bird : — 



Caprimulgus, sp., Humboldt, Journ. de Physique, liii. p. 57 

 (1801); Humb. et Bonpland, Voy. aux Reg. Equinoct. Obs. 

 Astron. i. p. 295 (1810) . 



Steatornis caripensis, Humboldt, Bull. Soc. Philom. Paris, 

 ser. 3, xvii. p. 51 (1817). 



Trinidad Goatsucker, Lath. Gen. Hist. B. vii. p. 365 



(1823). 

 Nyctibius steatornis, Stephens, Gen. Zool. xiii. pt. 2, 



p. 91 (1825). 



* See Gray and Mitchell, ' Genera of Birds,' i. p. 44, and elsewhere. 



t " Cette meme roche calcaire sert de base a une autre plus neuve, 

 tres-blanche, tres-dense, tres-fossile, pleine de cavernes (Cueva del Gua- 

 charo), remplie de millions d'oiseaux (une nouvelle espece de Caprimulgw 

 qui donnent une graisse tres-usitee ici ; — Cueva de S. Juan, Cueva del 

 Cuchivano), quelquefois poreuse, couime celle de la Franconie, forrnant 

 des rochers de figure grotesque (Morros de S. Juan, de S. Sebastien)." — 

 Humboldt, Journ. de Physique, de Chime, d'Hist. Nat. Paris, liii. p. 57 

 (1801). 



SER. VI.— VOL. II. 2 B 



