Abstract
A checklist of species in the pollen wasp subfamily Masarinae is presented, including synonyms and distributional summaries. The 297 valid species and 15 additional subspecies are arranged in 14 genera, divided into two tribes, Gayellini and Masarini, with the latter divided into the subtribes Priscomasarina, Paragiina, and Masarina. Thirty-two new combinations are made.