它们的部分前翅是覆盖在后翅上的，这在能飞的昆虫中是独一无二的。
They are also unique among flying insects because their fore wings partly overlap their hind wings.
它上翅上的鳞屑是蓝色的，所以它又有另一个名字：细尾蓝小灰蝶(英文缩写为GBH)，(GHB是它的朋友，这个缩写在英国是严重的身体伤害的意思！)
The scales on its upper wings are blue, so giving it its alternative name, the Great blue Hairstreak (GBH to his friends, which stands for Grievous Bodily Harm in the UK!)
后来的翼的发育过程中，产生了无翅基因这种形成机制，并且通过促进特定区域的细胞生成色素的方法来在翼上扩散花纹。
Late in wing development, the Wingless morphogen is produced and diffuses through tissue where it prompts cells in certain areas of the wing to make pigment.
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