STUDIES ON MOSQUITOS (DIPTERA, CULICIDAE) AND ANTHROPIC ENVIRONMENT .4. SURVEY OF RESTING ADULTS AND SYNANTHROPIC BEHAVIOR IN SOUTH-EASTERN, BRAZIL

Resting adults Culicidae were collected from January 1992 through Janu ary 1993 in several habitats of the Ribeira Valley region. The diversi ty of species found among them suggested that the vegetation remaining within human settlements favored the survival and the population incr ease of some mosquitoes. Among there are: Ae. scapularis, Ae. serratus , Cx. (Culex), Cx. nigripalpus and Cx. (Melanoconion) such as Cx. ribe irensis. That preservation role may be attributed to the rearing of li vestock and the consequent increase in the number of blood sources. Th ese species may be classified as hemisynanthropes and Cx. oedipus appa rently evolving to the eusynanthropic status. On the other hand, An. c ruzii showed an asynanthropic behaviour, with a low degree of survival in the modified human environment. Epidemiological implications of th e data are mentioned.