下唇

The results showed that there was only single type of sensilla on the tips of maxillary palpi, labial palpi.

结果发现，在柳蓝叶甲下鄂须、下唇须和前足跗节上都只有单一感器存在。

It is pronoumced by raising the tongue tip against the upper teethridge to block the air and then putting it down to release the air.

下唇和上齿接触，形一条缝，气流从缝中磨擦而出。

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，上唇退化为一条窄横片，下唇退化为一小片（下唇须发达）。