Evania appendigaster
![](/Images/godic/202501/12/Evania_appendigaster_30246.jpg")
![E. appendigaster, with the flaglike gaster (hind section of the abdomen) clearly visible](/Images/godic/202501/12/Evania_appendigaster0246.jpg")
Evania appendigaster is a species of wasp in the family Evaniidae, the ensign wasps. Its native range is not known, but it likely originated in Asia. Today it occurs throughout the tropics and subtropics and in many temperate regions. It is a parasitoid wasp known for specializing on cockroaches.