CUYABA or CUIABA, capital of the inland State of Matto Grosso, Brazil, about 972 m. N.W. of Rio de Janeiro, on the Cuyaba river near its discharge into the Sao Lourenco, the prin cipal Brazilian tributary of the Paraguay. Pop. (192o) 14,367. Cuyaba has uninterrupted steamer communication with Monte video, about 2,50o m. distant, but has no land communication with the national capital, except by telegraph. The climate is hot and malaria is prevalent. Cuyaba was founded in 1719 by Paulista gold hunters, and its gold-washings, now apparently exhausted, yielded rich results in the 18th century. It is the see of a bish opric and headquarters of an important military district, having an arsenal and military barracks.