Nguyen, Lien Thi PhuongNguyen, Anh D.Tran, Ngat ThiNguyen, Manh ThanhEngel, Michael S.2023-07-102023-07-102023-06-06Nguyen LTP, Nguyen AD, Tran NT, Nguyen MT, Engel MS (2023) The potter wasp genus Allorhynchium from Vietnam, with descriptions of three new species and a new country record (Hymenoptera, Vespidae, Eumeninae). ZooKeys 1166: 1-32. https://doi.org/10.3897/zookeys.1166.102674https://hdl.handle.net/1808/34573Species 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.© Lien Thi Phuong Nguyen et al. This is an open access article distributed under the terms of the CC0 Public Domain Dedication.https://creativecommons.org/publicdomain/zero/1.0/BiodiversityIdentification keyOriental regionSolitary waspsTaxonomyArticle10.3897/zookeys.1166.102674https://orcid.org/0000-0003-3527-9577https://orcid.org/0000-0001-9273-0040https://orcid.org/0000-0002-7057-4638https://orcid.org/0000-0003-3067-077XPMC10265496openAccess