bag.worm
n.（名词）Any of several moths of the family Psychidae, which construct fibrous cases of silk spun together with leaves, twigs, or grass. The plant-feeding larvae and wingless adult females live in these cases.蓑蛾虫：一种蓑蛾科的蛾或蛀虫，它用叶子、嫩枝和草共同织成的丝建造一个纤维质的壳，食草幼虫和没有翅膀的成年雌虫生活在这些壳里
