Abstract
An overview of the Brazilian fauna of pollen wasps (Hymenoptera: Vespidae: Masarinae) is made: an illustrated key for all species recorded or potentially occurring in the country is provided; the male of Trimeria rubra Hermes & Melo is described; two species (Ceramiopsis paraguayensis Bertoni and T. bequaerti Willink) are newly recorded for Brazil; three species (Paramasaris richardsi (Giordani Soika), T. rubra and T. robusta Hermes & Melo) are newly recorded for Brazilian states and flower records are given for T. rubra for the first time.References
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