TUPIS (Comrades)  , a tribe and stock of South American Indians of Brazil . They call all other peoples Tapuyas (foreigners) . Their original home is believed to have been on the Amazon, and from its mouth they spread far southwards along the Brazilian coast . When hard pressed by the Portuguese they retreated to the Andes . Martius gives the Tupi nation a wide range, from the Atlantic to the Andes, and from Paraguay to the Amazon . Of this stock are the Omaguas, Cocomas and other Peruvian tribes . Latham makes the Tupis members of the Guarani stock . The " Lingoa Geral " or trade language between Portuguese and Amazon Indians is a corruption of the Tupi tongue .