The "Bromeliad-Kerteszia" problem may be summarized in four important points, as far as the soil relief is concerned: 1 - Zone where the Anopheles (Kerteszia) cruzii is found; continental plains of the basins of the Itapocú river in the north and the Araranguá river in the south of the region here considered. 2 - Zone where the Anopheles (Kerteszia) cruzii and bellator are found; quaternary plains of marine sedimentation (restingas). 3 - Zone where the Anopheles (Kerteszia) cruzii, bellator and homunculus occur; sufficiently moved relief of the subparallel mountains toward EW. 4 - Zone where the Anopheles (Kerteszia) cruzii and homunculus occur; these are the slopes of the mountain borders of the crystalline highland deeply cut by rivers going to the sea. It is shown, moreover, that the percentage of larges of Anopheles (Kerteszia) cruzii is more or less the same in the four regions. This fact points to the following conclusions: 1 - the large increasing or decreasing of positivity of the biotopes is not in correlation with the number of larves of A. (K.) cruzii present. The variation in positivity is rather on the dependence of the "habitats" suitable to the development of the A. (K.) bellator and homunculus. Finally it is shown that, in a general way, the positivity of the biotopes decreases from E. to W. and, to a lesser extent, from N. to S.