Short Communication
Abstract
In the south of Brazil some species of bumblebees are disappearing, such as: Bombus bellicosus in Paraná State. Insecticides and other pesticides and global warming are possible candidates for such phenomena, but none of them has been deeply studied. In forest fragments at southeast of Brazil (Sorocaba City, São Paulo State) tachinid fly larvae were found inside the abdomen of foraging females of Bombus morio and Bombus atratus. It is the first time that the occurrence of such parasitism is described for these species and it could be of some relationship to the disappearance of the genus Bombus.
Key words: Bumblebee, Bombus atratus, Bombus morio, parasitism, tachinidae.
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