The Lymantriidae comprises about 2700 species distributed globally. Their larvae are characterised by having a pair of funnel wart, and often considered to be polyphagous pests of woody plants and sanitary pests due to the urticating setae that cause various allergic syndromes. In the present study we focus on the phylogeny and systematics of the major lineages of the tribe Nygmiini. The taxonomic chaos of the tribe involve a polyphyletic genus Euproctis Hübner, 1819, which is initially established upon the European Phalaena chrysorrhoea Linnaeus, 1758 and so far comprising more than 650 species. Holloway attempted to resolve the generic systematics the tribe for the Malayan-Indoaustralian region, but many “Euproctis” species, even with importance in agriculture and biodiversity research, have not been assigned to any appropriate genus. Therefore a phylogenetic hypothesis to be based to resolve the systematic chaos becomes needed. Our research is to address two main questions: 1) is the tribe Nygmiini monophyletic? and 2) what are the internal relationships of the Nygmiini? We used more than 100 lymantriid species representing all the tribes and major lineages to reconstruct a phylogeny based on adult and immature morphology. The preliminary result shows that the Nygmiini is confined to the Old World and the synapomorphies are better provided by the larval stages. We also found that sexual dimorphism and polymorphism are very common in this tribe and thus the current taxonomy is very misleading.