Review of the Aglaostigma niuae group (Hymenoptera: Tenthredinidae) with descriptions of four new Chinese species

The Aglaostigma niuae group is established, and its diagnosis is briefly discussed. Four new species of the A. niuae group from China are described and illustrated: A. hejunhuai sp. nov., A. leucotarsalina sp. nov., A. niuae sp. nov., and A tricoloricorne sp. nov. A key to all species of the A. niuae group is provided.