Each of their toes is covered with " setae " tiny projections much thinner than a human hair .
它们每个脚趾都附着“刚毛”比人体头发还要细得多的微小突起。
On land , leaf beetles ( gastrophysa viridula ) secrete fluid into hair-like structures called setae on their feet .
生活在陆地的叶甲(gastrophysaviridula)分泌液体到脚上的刚毛(毛状结构)部位。
Young shoots and petioles tomentose , setae slender or absent .
被绒毛的幼枝和叶柄,刚毛纤细的或无。
Forces exerted by the setae and the fluid keep the insects attached to surfaces that they are walking on , but such forces don 't usually act inwater .