palm.er.worm

n.（名詞）
Any of several caterpillars that injure fruit trees by feeding on their leaves, especially the small green caterpillar of the North American mothDichomeris ligulella.
小舌麥蛾：吃果樹的葉子而傷害果樹的毛蟲，尤指北美洲飛蛾的小綠毛蟲小舌麥蛾

來源：
[From the way they suddenly appear in large numbers like a throng of pilgrims]
[源于他們象香客一樣突然大量出現(xiàn)]