A.S. Corbet published a key for the separation of the Indo-Australian and African species of the genus Euploea Fabricius in 1943. He dealt with all the known Euploea species except two species in the keyS and furnished a foundation for the classification of this taxonomically difficult genus. Euploea blossomae Schaus, 1929, is one of the two species which were not included in Corbet's key, due to the fact that its affinities could not be recognized from the original description. Recently I had a chance to examine a single female from Luzon, Philippines, and also an unique pair from Palawan, Philippines, both belonging to this Euploea species. The female of Euploea blocsomae is described for the first time, this species is newly recorded from Palawan and the Palawan race is described as a new subspecies. In compiling this paper I tender my warmest thanks to Messrs. Y. Honda and K. Unno for providing me with the specimens of this very rare species, which they captured in Palawan and Luzon respectively. I would like to express my heartfelt thanks to Lt. Col. J. N. Eliot, Somerset, for his kind information on this Euploea species. To Messrs. T. G. Howarth and R. I. Vane-Wright, British Museum (Natural History), I am indebted for their kind informations on the type specimen of Euploea blossomae and for their advices.
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