Abstract

The previously unknown morphs of the autumn generations of Periphyllus koelreuteriae (Takahashi, 1919) (Hemiptera, Aphididae: Chaitophorinae)-the viviparous apterous female, the oviparous female and the alate male-are described and illustrated in detail based on specimens that were collected in China. Because P. koelreuteriae is a significant pest species that damages the ornamental and medicinal plants of the genus Koelreuteria, notes on its biology, host plants and distribution are presented.

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