army worm
noun
1- any of a number of insect larvae which occur in destructive swarms, in particular（成群出现、有破坏性的）昆虫幼虫, 尤指：
1.1
- the caterpillars of some moths, which feed on cereals and other crops and move en masse when the food is exhausted (Spodoptera and other genera, family Noctuidae).蛾幼虫（灰翅夜蛾属及其他属, 夜蛾科）。
1.2
- the small maggots of certain fungus gnats, which move in large numbers within secreted slime (genus Sciara, family Mycetophilidae).黏虫（尖眼蕈蚊属, 蕈蚊科）。