Genus Allorhynchium van der Vecht, 1963

Allorhynchium van der Vecht, 1963: 57, 58. Type species: Vespa argentata Fabricius, 1804, by original designation.

Diagnosis.

Anterior surface of pronotum without pits or foveae. Tegula not evenly rounded posteriorly, emarginate adjoining parategula and often shorter than latter; axillary fossa in dorsal view much narrower than long, slit-like. Metanotum flat, without tubercles. Propodeum without deep fossae, submarginal carina and valvula not protruding; propodeal dorsum raised shelf-like to same level with metanotum (but see some of the species herein that lack this feature). Mesofemur not emarginate basally. Forewing with prestigma> 1/2 length of pterostigma (as measured along posterior margin); third submarginal cell separated from apex of marginal cell by ~ 1/2 its length. Metasoma segment I sessile, ca. as wide as segment II; tergum I with tendency to form a transverse rim at junction of anterior-facing and dorsal-facing surfaces but without transverse carina.

Additionally, according to van der Vecht (1963), the declivity of the propodeum has a median carina that runs upwards into a deep, oval, fovea at a short distance from the metanotum; metasomal sternum VII of the male has one or two tubercles; and in some species metasomal sternum II is excavated or armed with two teeth or with a flattened tubercle.