研究了东方龙虱(雄性)抱握足上吸附脚掌的形态结构、吸附机制及其在2种不同表面的吸附特性.扫描电镜观察发现其吸附脚掌由4排吸附结构及其外围的吸附刚毛群构成,其吸附结构由约15个"鞋垫"状微吸盘平行并排构成一体.吸附机制为微吸盘的真空负压吸附和刚毛群的范德华力粘附.实验测定吸附脚掌在东方龙虱鞘翅表面和玻璃表面产生的最大法向吸附力为53.3 mN,最大切向吸附力为213.5 mN.在2种表面上(干、湿状态)其切向吸附力均远大于法向吸附力,大约是法向吸附力的6～8倍,同时吸附脚掌在湿表面的切向吸附力比干表面大得多,法向吸附力却相反.法向吸附力主要由刚毛群的范德华力产生,而切向吸附力由真空吸附和范德华力共同产生.
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