Abstract
An aggregation of male alates of Solenopsis richteri was observed in a grazed field in Argentina. Males flew in an ovoid-shaped cloud approximately 2 m from the ground and approximately 2 m wide and 5 m tall. Females entered the aggregation singly. Each female flew slowly into the center of the male aggregation, where she hovered in place until a male seized her. The pair immediately fell to the ground and most pairs were in copula by the time they hit the ground. This type of mating system fits the description of male-aggregation syndrome. Implications for application are discussed.
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