The representatives of the damselfly family Pseudostigmatidae are known for their ability to catch small orb web spiders, or in some cases small kleptoparasitic spiders in the webs of other spiders. In this paper, I demonstrate that the nanoscopic crystalline wax coverage of wings in the pseudostigmatid damselfly Mecistogaster ornata is partially altered due to the presence of fluid-contaminated spots corresponding in their shapes and distribution to the typical beads-on-a-string (BOAS) geometry of sticky threads of orb web spiders. The spider fluid has the ability to wet superhydrophobic crystalline wax coverage. Also residues of the sticky threads were revealed in high quantities on the wing surface. The data suggest that the pseudostigmatid damselflies, due to their specific prey capturing method, have some costs and risks of being trapped by the sticky spider webs. However, high resolution SEM images revealed that the crystalline wax coverage of wings, in spite of its wettability by the spider glue, functions as a sacrificial anti-adhesive layer protecting the damselfly surface against spider adhesive traps.

中文翻译：

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豆娘 Mecistogaster ornata (Zygoptera, Pseudostigmatidae) 的翅膀表面：纳米蜡和粘性蜘蛛网之间的相互作用

豆娘科 Pseudostigmatidae 的代表以其捕捉小型球网蜘蛛的能力而闻名，或者在某些情况下捕捉其他蜘蛛网中的小型窃电寄生蜘蛛。在本文中，我证明了假柱头豆娘 Mecistogaster ornata 翅膀的纳米级结晶蜡覆盖部分改变，因为存在流体污染点，它们的形状和分布与典型的珠子串（BOAS ) 球网蜘蛛粘线的几何形状。蜘蛛液具有润湿超疏水结晶蜡覆盖层的能力。机翼表面还大量残留粘线。数据表明，伪柱头豆娘由于其特定的猎物捕获方法，有一些成本和被粘性蜘蛛网困住的风险。然而，高分辨率 SEM 图像显示，尽管蜘蛛胶具有可润湿性，但翅膀的结晶蜡覆盖层起到了牺牲抗粘层的作用，保护豆娘表面免受蜘蛛粘滞陷阱的影响。