The potter wasp genus Allorhynchium from Vietnam, with descriptions of three new species and a new country record (Hymenoptera, Vespidae, Eumeninae)

Species of the potter wasp genus Allorhynchium van der Vecht (Eumeninae: Odynerini) occurring in Vietnam are presented. Seven species have been recorded from Vietnam. Of them, three species are described as new to science: Allorhynchium latum Nguyen, Tran & MT Nguyen, sp. nov., A. moerum Nguyen & AD Nguyen, sp. nov., and A. setosum Nguyen & Engel, sp. nov., and one species, A. argentatum (Fabricius, 1804), is recorded from Vietnam for the first time. An updated key to the Oriental species of the genus is presented