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A flutuação sazonal, a freqüência horária e a ocorrência dos flebotomíneos nos ambientes intradomiciliar, peridomiciliar e extradomiciliar (cerrado), no município de Santa Quitéria, Estado do Maranhão foram estudados. Os espécimes foram capturados entre 18 e 6 horas, de maio de 1999 a abril de 2000, com armadilhas luminosas tipo CDC. Foram coletados 4.880 espécimes de 11 espécies. A riqueza e abundância foram maiores no peridomicílio (11 espécies; 50,1% dos espécimes), seguido pelo intradomicílio (9 espécies, 34%) e cerrado (7 espécies, 15,8%). Duas espécies foram encontradas na estação chuvosa, uma na estiagem e oito em ambas estações. Na estiagem foram registradas elevadas freqüências de Lutzomyia longipalpis Lutz & Neiva, 1912 (88,4%), L. evandroi Costa Lima & Antunes, 1936 (83,6%), L. lenti Mangabeira, 1938 (86%) e L. shannoni Dyar, 1929 (100%), enquanto as freqüências de L. quinquefer Dyar, 1929 (100%) e L. whitmani Antunes & Coutinho, 1939 (75%) foram maiores no período chuvoso. Os flebotomíneos foram encontrados a noite inteira, mas os horários de maior freqüência variaram de acordo com a espécie, observando-se picos no crepúsculo vespertino e primeiras horas da noite: L. quinquefer (18 h - 19 h); L. goiana Martins, Falcão & Silva, 1962 (18 h - 21 h); L. whitmani (19 h - 21 h) e L. longipalpis (20 h - 21 h) e ao longo da noite e no crepúsculo matutino: L. evandroi (21 h - 23 h e 3 h - 5 h), L. longipalpis (1 h - 3 h), L. lenti (22 h - 23 h e 4 h - 5 h). A ocorrência dos flebotomíneos nos diferentes ambientes, horários e estações vem sendo acompanhada por notificações de vários casos de leishmanioses cutânea e visceral. The seasonal fluctuation, hourly frequency and occurrence of phlebotomine sandflies inside and around dwellings and in the cerrado area of the municipality of Santa Quitéria, State of Maranhão were studied. The specimens were collected between 6:00 pm and 6:00 am from May 1999 to April 2000 through CDC-type light traps. A total of 4,880 specimens belonging to 11 species were collected. The highest species richness and abundance were observed around dwellings (11 species, 50.1% of the specimens), followed by species collected inside dwellings (9 species, 34%) and in the cerrado (7 species, 15.8%). Two species were found during the rainy season, one during the dry season and eight during both seasons. High frequencies of Lutzomyia longipalpis Lutz & Neiva, 1912 (88.4%), L. evandroi Costa Lima & Antunes, 1936 (83.6%), L. lenti Mangabeira, 1938 (86%), and L. shannoni Dyar, 1929 (100%) were recorded during the dry season, whereas the frequencies of L. quinquefer Dyar, 1929 (100%) and L. whitmani Antunes & Coutinho, 1939 (75%) were higher during the rainy period. Phlebotomine sandflies were collected throughout the night, but the times of higher frequency varied according to species, with peaks being observed for L. quinquefer (6:00 - 7:00 pm), L. goiana Martins, Falcão & Silva, 1962 (6:00 - 9:00 pm), L. whitmani (7:00 - 9:00 pm), and L. longipalpis (8:00 - 9:00 pm) during sunset and in the first night hours, and for L. evandroi (9:00 - 11:00 pm and 3:00 - 5:00 am), L. longipalpis (1:00 - 3:00 am), and L. lenti (10:00 - 11:00 pm and 4:00 - 5:00 am) throughout the night and during dawn. The occurrence of phlebotomine sandflies in different environments, at different times and during different seasons is accompanied by the notification of severed cases of cutaneous and visceral leishmaniasis

Dinâmica espaço-temporal de flebotomíneos (Diptera, Psychodidae) do município de Santa Quitéria, área de cerrado do Estado do Maranhão, Brasil