''Macrocalymma'' is an Australian genus of

potter wasp Potter wasps (or mason wasps), the Eumeninae, are a cosmopolitan wasp group presently treated as a subfamily of Vespidae, but sometimes recognized in the past as a separate family, Eumenidae. Recognition Most eumenine species are black or brown, ...

References

Biological pest control wasps Potter wasps Taxa named by Robert Cyril Layton Perkins {{Potter-wasp-stub