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Flower visiting insects were monitored on angiosperm trees in an Araucariaforest in Rio Grande do Sui, Brazil. The most abundant flower visitors were workers of the introduced honey bee, A pis mellifera,followed by stingless bees which were represented by 8 species. Together with other bees, they provide the main guild of foragers on flowering tree.~. The stingless bee fauna of the study area is similar to that of other regions of the Mat a Atlfintica, especially of former Araucariaforests, but also of montane coastal rain forests.