bag.worm

n.（名詞）
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.
蓑蛾蟲：一種蓑蛾科的蛾或蛀蟲，它用葉子、嫩枝和草共同織成的絲建造一個纖維質(zhì)的殼，食草幼蟲和沒有翅膀的成年雌蟲生活在這些殼里