The bee fauna of a restrict area of Lowland Region of Maranhão was studied. Monthly samples were performed with entomological net and baits trap with attractive compounds, totalling 288 hours of sampling. A total of 839 individuals belonging to 38 species of the bee families Apidae, Megachilidae, Halictidae, Andrenidae and Colletidae were collected on flowers and 72 individuals (11 species) of Euglossinae in baits trap. Scaptotrigona flavisetis Moure, Trigona pallens Cockerell and Apis mellifera Linnaeus were most frequent species in the area. Bee frequencies showed various patterns of seasonality, i.e. the period in which most bees of S. flavisetis were observed were January and October, T. pallens in January and February and A. mellifera in April. Euglossa (E.) cordata and E. (E.) gr. modestior were the most frequent species collected in baits traps and Eucaliptol was the most attractive compound.
Apoidea; seasonality; flower-visiting; chemical baits