Firstly Finding and Descriptions of Certain Forms and Egg of Eriosoma lanuginosum dilanuginosum Zhang(Homoptera:Aphidoidea:Pemphigidae)

The forms of fundatrix, apterous fundatrigeniae, alate fundatrigeniae, virginogenia (apterous alienicola), alate sexupara, female, male and egg of Eriosoma lanuginosum dilanuginosum Zhang are described firstly in this paper. Apterous fundatrigeniae are apterous viviparous females from primary hosts, Ulmus sp. Alate fundatrigeniae are alate viviparous females from primary hosts. Virginogenia are apterous viviparous females from secondary hosts, Pyrus sp. Alate sexupara are alate viviparous females from secondary hosts. All those formae and egg are firstly described, except for alate fundatrigeniae. All specimens studied are deposited in the Chinese Institute of Zoology, Chinese Academy of Sciences.