The present work is part of the studies carried out by the Serviço Nacional de Malária in cooperation with technicians of the Instituto Oswaldo Cruz in coastal region of Southern Brazil, from 1949 to 1953. in view of the floristic unity existing among the associations studied in the various working stations, distributed at random and somewhat far from each other, and considering that the identity of those associations has been established, the authors suggest the generalization of the problem "bromeliad - kerteszia" in similar associations of the remaining pluvial formation in the southern coast of Brazil. The present contribution is an attempt to the bio-ecological maping of the three malaria vectors responsible for the widespread malaria outbreaks in the southern coastal region of Brazil.