The form and function of the mouthparts in adult Lepidoptera and their feeding behavior are reviewed from evolutionary and ecological points of view. The formation of the suctorial proboscis encompasses a fluid-tight food tube, special linking structures, modified sensory equipment, and novel intrinsic musculature. The evolution of these functionally important traits can be reconstructed within the Lepidoptera. The proboscis movements are explained by a hydraulic mechanism for uncoiling, whereas recoiling is governed by the intrinsic proboscis musculature and the cuticular elasticity. Fluid uptake is accomplished by the action of the cranial sucking pump, which enables uptake of a wide range of fluid quantities from different food sources. Nectar-feeding species exhibit stereotypical proboscis movements during flower handling. Behavioral modifications and derived proboscis morphology are often associated with specialized feeding preferences or an obligatory switch to alternative food sources.

中文翻译：

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鳞翅目成虫的摄食机制：口器的结构、功能和进化。

从进化和生态的角度回顾了鳞翅目成虫口器的形式和功能及其摄食行为。吸管的形成包括一个不透流体的食物管、特殊的连接结构、改良的感觉设备和新颖的内在肌肉组织。这些功能上重要的特征的进化可以在鳞翅目内重建。长鼻运动由用于展开的液压机制解释，而回缩由内在长鼻肌肉组织和表皮弹性控制。液体吸收是通过颅吸泵的作用来完成的，它能够从不同的食物来源吸收范围广泛的液体量。花蜜喂养物种在花卉处理过程中表现出刻板的长鼻运动。