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
片，下唇小片（下唇须发达）。
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理学篇 In an anatomical female, that involves the vulva, which includes the mons pubis over the pubic bone, and labia majora and labia minora — the elongated skin folds that surround the vestibule, which contains both the urethral and vaginal openings.
在解
学女性中，这涉及外阴，包
耻骨上
耻骨，大阴唇和小阴唇——前庭周
长皮肤褶皱，前庭包尿道口和阴道口。
