A tonguelike structure in the labium of an insect.
我忽然感到有虫子顺着我腿往上爬。
A tonguelike structure in the labium of an insect.
我忽然感到有虫子顺着我腿往上爬。
The mandibles are usually lost, the labrum is reduced to a narrow transverse sclerite, and the labium is a small flap ( though its palps retain quite large).
上颚消失,上唇退化为条窄横片,下唇退化为小片(下唇须发达)。
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