Contribution to the taxonomy of the paper wasp genus Polistes (Polistella) (Hymenoptera: Vespidae: Polistinae) from Vietnam, with description of a new species

One species of the genus Polistes, Polistes (Polistella) caobangensis Nguyen, sp. nov. is described from the northern part of Vietnam. In addition, males of two other species, Polistes (Polistella) gilvus Nguyen, Kojima and Saito and Polistes (Polistella) brunus Nguyen and Carpenter are also described for the first time.