Parasitic wasps reared from larvae of Stenocephus fraxini on Fraxinus chinnensis from Shandong Province, China were found to be two new species of Pteromalidae (Hymenoptera: Chalcidoidea). The characters of marginal vein, antenna, and propodeum show that the new species is close to the members of Cyrtoptyx, but hairs on thorax are white and conspicuous, the dorsellum is relatively large and reticulated, and marginal fringe on fore wing are absent. All characters are sufficient to justify the erection of a new genus, Neocyrtoptyx gen. nov., to accommodate the new species N. shanghensis sp. nov. and N. exilis sp. nov.