Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species

The species of Periacma Meyrick from China are reviewed. Thirty-two species are treated, including four new species (P. latizona sp. nov., P. leyensis sp. nov., P. spinivalvula sp. nov. and P. rectignatha sp. nov.). Females of four species (P. iodesma vietnamica Lvovsky, P. zhouzhiensis Wang & Zheng, P. binchuanensis Wang & Zheng and P. equivalvata Wang, Li & Liu) are described for the first time. Periacma chengchengensis Wang & Zheng is synonymized with P. delegate Meyrick, and Periacma plumbea Meyrick is newly recorded from China. Photographs of the adults treated here and the genital structures of the new species are provided. A distribution map of Periacma Meyrick in China and a key to all the Chinese species, except P. isanensis Moriuti et al., are given based on the male genitalia.