Cockroaches beware!. Here is an Evaniid wasp, Ensign Wasp (the abdomen is a flag...get it?), possibly Hyptia harpyoides. This group parasitizes cockroaches at least our native cockroaches. Not sure if they find our indoor cockroaches acceptable.
seen from United States
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seen from United States
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seen from Türkiye

seen from United States

seen from Philippines
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seen from United States

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seen from France
Cockroaches beware!. Here is an Evaniid wasp, Ensign Wasp (the abdomen is a flag...get it?), possibly Hyptia harpyoides. This group parasitizes cockroaches at least our native cockroaches. Not sure if they find our indoor cockroaches acceptable.
#365Insects 49: #Parcoblatta pennsylvanica (De Geer, 1773) This Pennsylvania Wood Roach and her siblings were lucky and avoided being parasitized by #Hyptia thoracica when they were in their shared egg case. Whether her own egg cases evaded evaniids, we'll never know, although the odds are in her favour; evaniid parasitism has been estimated at 6.7% for wild wood roach egg cases. (at University of Guelph)
#365Insects 48: #Hyptia thoracica (Blanchard, 1840) This Ensign Wasp (so named for the way the small, flag-like abdomen that is held up high) is a parasitoid of cockroach egg cases. Not just any cockroaches; this is a wasp with refined tastes, for which only the Pennsylvania Wood Roach (#Parcoblatta virginica), a common species that prefers wooded areas over our homes, will do. But more on that, later. (at University of Guelph)