Pollen wasps, the Masarinae, are unusual wasps that are typically treated as a subfamily of Vespidae, but have in the past sometimes been recognized as a separate family, "Masaridae", which also included the subfamilies Euparagiinae and Gayellinae.
Pollen wasps, the Masarinae, are distinctive wasps usually classified as a subfamily of Vespidae but occasionally considered a separate family, "Masaridae", which also encompassed the subfamilies Euparagiinae and Gayellinae.