Myzus kawatabiensis Miyazaki 1971 reinstated

To judge from paratypes in the BMNH colln, the synonymy of this species with M. formosanus Takahashi (Eastop & Hille Ris Lambers 1976) is incorrect. M. kawatabiensis occurs on Polygonum thunbergii in Japan, and possibly also in east Siberia (as M. formosanus, Pashtshenko 1988). (It might however be a synonym of the little­known M. polygoniyonai Shinji, described from P. viscosum .)