Three new species of Arge Schrank are described from China: Arge distincta Wei et Zhang, sp. nov., A. rufotibiella Wei et Zhang, sp. nov. and A. tenuicornis Wei et Zhang, sp. nov. A new species group of Arge marginellia group, is proposed for the three new species and two known species, A. marginellia Wei, 2002 and A. basifusca Malaise, 1947 based on their peculiar characters of wing maculae and shape of sheath. A key to species of marginellia group is provided. Type specimens are deposited in the Insect Collection of Central South University ...