Key to Species of Aulacaspis (Hemiptera: Diaspididae) Intercepted at the Republic of Korea Ports of Entry

Six species of aulacaspis scales, Aulacaspis crawii (Cockerell), Aulacaspis madiunensis (Zehntner), Aulacaspis neospinosa Tang, Aulacaspis spinosa (Maskell), Aulacaspis tubercularis Newstead and Aulacaspis yasumatsui Takagi, have been taken in quarantine at the republic of Korea ports of entry between 1996 and 2005. We have also found the specimens of A. yasumatsui Takagi on Cycas plants from Malaysia and Taiwan and provide a key with illustrative photographs to identify intercepted specimens of Aulacaspis.