Definition of "hymenopteron"

The remaining insects included larvae of midges, soldier-flies, horse-flies, may-flies, a hymenopteron, and a bird louse, of a species (Lipeurus squalidus) known to infest the Shoveller.

1922, John Charles Phillips, A Natural History of the Ducks

“The couple holding hands in the corner could be the Bee and a lady friend,” Prance said. “They're the likeliest bet, although that one really large table might hold a hymenopteron. Do you recognize any of them?”

2012, Joan Smith, To Mourn a Murder