The morphological characters of four species of felted scale insects, i.e. Asiacornococcus kaki Kuwana, Eriococcus costatus Danzig, E. lagerostroemiae Kuwana and E. koelreuterius sp. nov. were elaborately studied and illustrated for each stage.

• 本文详细研究了四种毡蚧即柿树白毡蚧Asiacornococcus kaki(Kuwana)、石榴囊毡蚧 Eriococcus lagerostroemiae Kuwana、沿海榆毡蚧 Eriococcus costatus(Danzig)和栾树毡蚧 Eriococcus koelreuterius sp.；nov的各虫龄的形态特征；详细描述了其显微特征；绘制了各虫龄的特征图。