In one of my old attempts at SF, I used the term 'lepidopter' for that kind of vehicle.    From Wordnik.com.  [Utopiales Poster, Part 2] Reference

So how does lepidopter lag compare to ordinary jet lag?.    From Wordnik.com.  [Voyage to Utopiales] Reference

Thank you for taking us along for a ride in your process of painting a lepidopter!.    From Wordnik.com.  [Utopiales Poster, Part 7: The Painting] Reference

Rather than "butterfly ornithopter," I think a simpler and more accurate term for this vehicle would be "lepidopter.".    From Wordnik.com.  [Utopiales Poster, Part 2] Reference

The lepidopter reminds me of some of the strutters you've designed before...perhaps some Dinotopians found a way back to France?.    From Wordnik.com.  [Line Drawing] Reference

As it was, I have profited by the malevolent curiosity which induces that amiable lepidopter to insinuate himself into all studios.    From Wordnik.com.  [The Deputy of Arcis] Reference