EN
A new species of Polydictya Guérin-Méneville, 1844, P. duffelsi sp. nov., is described from Sumatra and illustrated. The species is compared with the other Polydictya species showing hind wings red basally and an identification key to those species is proposed. Hind wing colour variation is reported for P. chantrainei Nagai et Porion, 2004 and the species is mentioned for the first time from Myanmar and Laos. A distribution map is given for P. duffelsi and P. chantrainei.