Ripiphorus fasciatus
Ripiphorus fasciatus is a species of wedge-shaped beetle with parasitoid larvae. R. fasciatus likely parasitizes Halictid bees; all Ripiphorus parasitize ground-nesting bees. Description
R. fasciatus has clear hindwings, plumose antenna, and superficially resembles a bee or fly. Range
This species has been documented in the northeastern United States and Eastern Canada. References

Ripiphoridae
Beetles of North America
Taxa named by Thomas Say
Beetles described in 1823