Palumbina pylartis and its host plant in Fukuoka Pref. A host plant: Castanopsis sieboldii (Fagaceae) B infected leaf C small hole at the base of the midrib of leaf (Upper surface) D leaf tip cut by larva E larva protruding from its leaf shelter F leaf cut by larva G newly leaf case made by larva H, I dried leaf case on upper and lower leaf surface J pupa in a cocoon K pupa L pupal exuvia left by an emerged adult.