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Published online by Cambridge University Press: 31 May 2012
An oversight (ante p. 167, line 27) leads me to state that it is in the Aporid section of the Pierinœ that the pupa has the adbominal segments 5 and 6 moveable, whilst in the Pierids proper only 5 is moveable. The Pieridi have until now alwasy included the Apord section; as a matter of fact, many Europen systematists have placed our Aporia crataegi in the genus Pieris.