Which is the other name for Pollen wasps?

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'. It is a small subfamily, unique among wasps in feeding their larvae exclusively with pollen and nectar, in a fashion quite similar to many solitary bees.

Most species are black or brown, marked with strikingly contrasting patterns of yellow, white, or red (or combinations thereof). They are most diverse and abundant in the desert regions of southern Africa, but also occur in the deserts of North and South America. Some species of 'Pseudomasaris' in California, such as 'Pseudomasaris vespoides', bear a remarkable resemblance to yellow jackets but can be recognized by their strongly clubbed antennae, a characteristic feature of the subfamily. Males have greatly elongated antennae, but still ending in a strong club.