A new genus of Microgastrinae parasitoid wasp endemic to New Zealand, Notogaster gen. nov. Fernández-Triana and Ward, is described, with ten new species: Notogaster avilai sp. nov., N. charlesi sp. nov., N. macdonaldae sp. nov., N. martini sp. nov., N. poultonae sp. nov., N. sucklingi sp. nov., N. toddae sp. nov., N. walkeri sp. nov., N. withersae sp. nov. and N. wornerae sp. nov. Based on some features, Notogaster resembles the genus Pholetesor Mason, although morphological and molecular data reveal they are not closely related. Notogaster is found throughout New Zealand, although many species are predominantly in the South Island. Species have been collected from a range of habitats, elevations, and collecting techniques. No host information is currently available.
Keywords: Hymenoptera, endemic, intra-specific variation, new taxa, parasitoid wasp.