Paraguay, Bolivia, and Southern Brazil. 81 



been conceded to Bolivia are between Bahia Negra and tlie 

 fort of Coimbra. 



S. Brazil. — Eio Apa, Porto Martinho, Pan de Azucar, 

 Coirabra, Puga, Porto Esperan^a, Albuquerque, Boca de 

 Homiguera, Rabicho, Riacho Paraguay, Mirin, Corumba. 



The Ajo district is open grass camp or pampa, with a few 

 Tala woods. It is intersected by great swamps which water 

 the district, and, as might be expected, is rich in water- 

 haunting birds. It is also a very interesting locality, inas- 

 much as it is about the southern limit of many woodland 

 species common at Buenos Aires and to the northward, and 

 is about the northern limit of many Patagonian species that 

 migrate northward in the winter months. 



On the Rio Parana and Rio Paraguay the country is well 

 wooded for the whole of the course traversed, especially after 

 passing Corrientes, and at many of the ports there are 

 large factories for the cutting of wood. Large lagunas and 

 swamps are scattered over the country adjacent to the rivers. 

 Until the Rio Apa is reached no hills are seen except for a 

 few around Asuncion, but from the Rio Apa to Corumba 

 chains of low hills covered with bush are met with. The 

 passes through them by the Pan de Azucar (a conical hill of 

 some 1600 feet above sea-level) are extremely pretty, and 

 in many parts are covered with palms. Some of the most 

 interesting sights on this trip were the numbers of colonies 

 of breeding Terns, and I never cease to regret that, owing to 

 the loss of my negatives, I was unable to get photographs 

 of them. 



In working out my collections I have had access to a 

 series of birds and eggs made by Miss I. G. Runnacles at 

 Los Ynglascs in the Ajo district. I have included many of 

 these in this paper, especially where a species is not repre- 

 sented in my series, so as to make the list as complete as 

 possible. I have to thank Miss Runnacles for her kindness 

 in allowing me to do this, and for the use of her notes. 

 In all about two hundred species of birds are represented. 

 In every case I have given references to the ' Catalogue of 



SER. IX. — VOL. v. Q 



