Our campus museums consortium is assembling a series of exhibits on "real vs. fake objects/histories in a museum setting" including forgeries, fabrications, and frauds (but also replicas and reinterpretations).
I am aware of some entomological examples, like this fossil fly:
And maybe Richard Meinertzhagen's frauds touched on entomology, specifically lice?
Are you aware of any others that would be worth highlighting?
Thankful for any exciting tales,
Frost Entomological Museum
"Nothing is static. Everything is evolving. Everything is falling apart.”
― Chuck Palahniuk, Fight Club