Grubb, Among the Indians of the Paraguayan Chaco (London, 1904); E.
The Buenos Aires treaty of the 3rd of February 1876 fixed the frontier between Argentina and Paraguay, and assigned to Paraguay the portion of the Gran Chaco between Rio Verde and Bahia Negra; the appropriation of the portion between Rio Verde and the Pilcomayo was submitted to the arbitration of the president of the United States, who in 1878 assigned it to Paraguay.
These Chaco rivers are obstructed by sand bars and snags, which could be removed only by an expenditure of money unwarranted by the present population and traffic. In the southern pampa.
In the extreme south are the Bolivian Chaco and the llanos (open grassy plains) of Manzo, while above these in eastern Chuquisaca and southern Santa Cruz are extensive swamps and low-lying plains, subject to periodical inundations and of little value for agricultural and pastoral purposes.
The general elevation of the Chaco varies from 600 to 800 ft.
The western section forms part of the great plain called the Gran Chaco (see Argentina), and is to a large extent unexplored.
By Salta and the Chaco territory, E.
In the Chaco the tapir or anta (Tapir americanus) still finds a safe retreat, and the peccary (Dycotyles torquatus) ranges from Cordoba north to the Bolivian frontier.
The northern part of the Gran Chaco is partly wooded and swampy, and as the slope eastward is very gentle and the rivers much obstructed by sand bars, floating trees and vegetation, large areas are regularly flooded during rainy seasons.
By the Chaco and Santa Fe, S.