BENI (EL BENI), a lowland department of north-eastern Bolivia. Pop. in 1932, 56,064 including 6,000 wild Indians; area 95,354 sq.m. The "Llanos de Mojos," famous for their flourish ing Jesuit mission settlements of the 17th and 18th centuries, occupy the eastern part of this department and are still inhabited by an industrious peaceful native population, devoted to cattle raising and primitive methods of agriculture. Cattle and forest products, including rubber and coca, are exported to a limited extent. The capital, Trinidad (pop. in 1927, 6,000), is about six miles from the Mamore river in an open fertile country, and was once a flourishing Jesuit mission.