Mtre-Rios, a province of the Argentine Republic, bordered E., S., and W. by the rivers Parana and Uruguay, whence its name (between rivers). It is bounded N. by Cor-rientes, E. by the republic of Uruguay, S. by Buenos Ayres, and W. by Santa Fe; area, about 30,000 sq. m., although a late but inaccurate official statement makes it 50,000; pop. in 1859, 87,500; in 1869, 134,271, including about 18,000 foreigners. The increase was largely due to the Paraguayan war and to political disturbances in neighboring provinces. The country is intersected by a series of hills, none of which attain a greater elevation than 300 ft.; but toward the 1ST. W. rises Mount Montial, with a surface equal to about one fifth of that of the whole territory. Extensive forests cover the plains, especially along the banks of the rivers, which latter are exceedingly numerous, and not a few of considerable magnitude. The climate is in general mild and equable, and is considered by Europeans to be very salubrious. Entre-Rios is essentially a pastoral province; over 8,000 of its inhabitants are estancieros or cattle formers, with immense herds of horned cattle, sheep, horses, and swine. "Wheat, maize, mandioca, sugar cane, peanuts, tobacco, and many kinds of fruit are produced in abundance.

Cotton, until 1865 extensively cultivated, has since that time received but little attention, owing to periodical droughts, and the lack of hands to pick it. Cochineal, indigo, and cascarilla yield large crops spontaneously; and the silkworm has been introduced. The forests supply a great variety of valuable timber. Fine limestone abounds in many parts, and extensive quarries are worked along the margin of the Parana; a kind of cement is found in several localities, and exported to Buenos Ayres. Other important exports are hides, horns, tallow, jerked beef, dairy produce, eggs, honey, and wax. Occasional inundations and the want of adequate roads are great drawbacks to the prosperity of the province. There are 78 primary schools, 25 public and 53 private; and these were attended in 1871-2 by 3,691 children between the ages of 6 and 15 years, out of a total number of 36,840 children. The province is divided into departments, and these into distritos de campafia. Capital, Concep-cion del Uruguay.