Normally, beetles have wings hidden under their elytra.

甲虫在鞘下面通常藏有膀。

Crickets hold their elytra up which creates a small air pocket that acts as a sounding box.

蟋蟀把鞘形成一个小气囊，到小共鸣的作用。

For the candidates, these two components are mounted on the elytra — the two most rigid wings on the insect.

演奏者这两部分都在它们的鞘上面——鞘是昆虫的两个硬质的膀。

Pseudoscorpions normally live under the bark, but the females like to slip under the elytra of longhorns when they land close by.

伪蝎通常生活在树皮下不过雌性喜欢趁天牛落在身旁时溜到其鞘之下。

How differently constructed is the feathered wing of a bird and the membrane-covered wing of a bat; and still more so the four wings of a butterfly, the two wings of a fly, and the two wings with the elytra of a beetle.

鸟的羽毛膀和蝙蝠的膜覆盖的膀的构造有多么不同；更何况还有蝴蝶的四个膀、苍蝇的两个膀和甲虫的两个带有鞘的膀。