STUDIES ON MOSQUITOS (DIPTERA, CULICIDAE) AND ANTHROPIC ENVIRONMENT .8. SURVEY OF ADULT BEHAVIOR OF SPISSIPES SECTION SPECIES OF CULEX (MELANOCONION) IN SOUTH-EASTERN BRAZIL

A study of Spissipes Section of Culex (Melanoconion) adults behaviour was carried out from August 1992 through December 1993 in human domina ted (anthropic) environment in the Ribeira Valley, S.Paulo State, Braz il, By sampling at several sites it the dominance of Culex ribeirensis and Cx. sacchettae became evident even through a total number of ten species was recorded. Those two mosquitoes showed a clear tendency to frequent the domiciliary environment where they were caught, both indo or and outdoor, through the use of the human bait. In the outside envi ronments, the residual patchy forests seems to display a concentration role, from which these adults spread to the open land and reach the d wellings. As their vector competence has been demonstrated through the virus isolations in natural conditions, it is advisable to pay attent ion to the presence of these mosquitoes in the man-made environment.