Placoaphis siphunculata Richards 1961 = Ericaphis wakibae (Hottes 1934)

This synonymy was proposed by C.F. Smith (Remaudière & Remaudière, 1997). P. siphunculata was described from alate specimens on Rosa in British Columbia. Comparisons with alatae from several samples of E. wakibae from British Columbia collected by C.­k. Chan, and with the introduced UK population, support the synonymy.