wing case

elytron.

Also called wing cover.

Origin of wing case

First recorded in 1655–65

Here was the hind-leg of one of the smaller beetles, there the wing-case of a flying creature.

The Forgotten Planet |Murray Leinster
Certainly this resembles a rough sketch of the future wing-case; but how different from the mature structure!

Social Life in the Insect World |J. H. Fabre
On the right side of the body, in fig. 3, the wing has been folded up, and is covered by the wing-case.

Chatterbox, 1905. |Various
Shard, shrd, n. a fragment, as of an earthen vessel: the wing-case of a beetle.

Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) |Various

The instrument by which it produces its music is contrived out of the ordinary nervures of the wing-case.

The Western World |W.H.G. Kingston

wing-case

the nontechnical name for elytron