CHAPACURAN, a tribe or small group of tribes of South American Indians, regarded on rather slender evidence as consti tuting an independent linguistic stock. The stock, which corn prises the Ites, Pawumwas and other smaller tribes in addition to the Chapacuras, seems to have occupied the whole of the basin of the Rio Blanco in north-eastern Bolivia, together with the Gua pore from the mouth of the Blanco to its confluence with the Mamore, as well as the eastern tributaries of the Guapore between 12° and 13° S. Lat. The Chapacuras themselves lived on the Rio Blanco and about lake Chitiopa. They were a peaceful, sedentary agricultural folk, whose culture was generally similar to that of the Chiquitos (q.v.). The Pawumwas go almost naked, and use the blow-gun with poisoned darts.