54 
Mr. Charles Chubb on the 
made by Mr. Foster has been received in Europe, and therefore 
I hope that my present essay will be of some service to 
ornithology. 
Text-fig. 1. 
Map of part of Paraguay, showing the position of Sapucay. 
The following are some of the principal memoirs which 
deal with Paraguayan ornithology:— 
Azara, F. de. —Apuntamientos para la historia natural de los Paxaros 
del Paraguay y Rio de La Plata. Madrid, 1802-1805. 
Vieillot, L. P.—Nouveau Dictionnaire dTIistoire Naturelle. Paris, 
1816-1819. 
Hartlaub, Carl J. G.—Systematischer Index zu Don Felix de 
Azara’s Apuntamientos para la historia natural de los paxaros 
del Paraguay y Rio de la Plata. Bremen, 1847. 
Catalogue of the Birds in the British Museum. London, 1874-1898. 
Berlepsch, Hans, Graf von.—Systematisches Verzeicbniss der von 
Herrn Ricardo Rohde in Paraguay gesammelten Vogel. Journal 
fur Ornithologie, 1887, pp. 1-37,113-134. 
Bertoni, A. W.—Aves Nuevas del Paraguay. Asuncion, 1901, pp. 1- 
216. 
Oberholser, H. C.—List of Birds collected by "William T. Foster in 
Paraguay. Proc. U.S. Nat. Mus. xxv. pp. 127-147 (1902). 
Ihering, H. von.—As aves do Paraguay em compara 9 ao com as de Sao 
Paulo. Revista do Museu Paulista, vi. pp. 310-344 (1904). 
