412 Dr. E. Lonnbcrg on Birds from 



large series of birds, and also in making some interesting 

 field-notes on their life- hi story. 



The collections were made principally at the following 

 stations : — 



1. La Quinta, Province of Jujuy. — The vegetation bere 

 consisted of a luxuriant tropical or sub+ropical forest, in 

 which a lake, the " Laguna del Sauzal," lay imbedded. On 

 this lake bird-life was very rich. 



2. Moreno. — A place situated on the " Puna de Jujuy," 

 a large plateau some 250 kilometres in length, and from 

 50 to 70 kilometres in breadth. This plateau is about 

 3500 metres above sea-level ; it is sandy in the centre, but 

 is surrounded by rocks and mountains which attain to a 

 maximum height of 6100 metres. The sandy ground is 

 mostly firm, but in some places there are moving dunes. 

 The vegetation is very characteristic. There are no trees at 

 all, but numbers of xerophilous shrubs, as a rule about 

 a metre high, are scattered over the " puna," Between 

 them the naked sand lies bare, almost without any vege- 

 tation. In addition to the shrubs, great columnar cactuses 

 are found in numbers in some places. The sandy plain 

 is traversed by rivulets from the surrounding mountains, 

 which all end or disappear in a large central salina. During 

 the dry season this salina does not contain any water, but 

 becomes a thick layer of salt. Along the edges of the 

 rivulets there is a peculiar vegetation, and Pampas-grass 

 (Gynerium) also grows there. 



3. San Luis. — A small place near the Bolivian town of 

 Tarija, and Tolomosa, ten kilometres from it. Tarija is 

 situated 1900 metres above the sea. The ground is here a 

 kind of "loess/" renowned for its richness in pleistocene 

 fossils. This loess is most fantastically cut out by rivulets 

 and watercourses into " barrancas " of different shape and 

 appearance. The vegetation is mostly composed of low 

 mimosaceous trees and different shrubs of a spiny nature. 

 In the barrancas grow tall trees of Schinus and various 

 bushes. Along the river Salix humboldtiana attains a height 

 of about 15 metres. 



