Rhynchium, Sturm, 1829

Pham, Phong Huy & Kumar, P. Girish, 2016, Taxonomic notes on the genus Rhynchium Spinola (Hymenoptera: Vespidae: Eumeninae) from Vietnam, with a first checklist of the species worldwide, Ecologica Montenegrina 7, pp. 530-537 : 531

Key to species of the genus Rhynchium in Vietnam

1 Metasomal segment I and II usually entirely black, rarely with a thin reddish brown band apically of first or second or both segments ( Fig. 6 )........... R. haemorrhoidale haemorrhoidale ( Fabricius, 1775)

- Metasomal segment I and II black at basal half ( Figs. 1-2 ); Mandible long with apical tooth sharp, acute ( Figs. 3-4 ); Central frons with pubescences dense ( Fig. 5 ); Metasomal segment I and metasomal segment II with a broad yellowish brown band apically ( Figs. 1-2 ). .................................... .............................................................................................. R. brunneum brunneum ( Fabricius, 1793)

Figures

Figures 1-6. 1-5 - Rhynchium brunneum brunneum (Fabricius, 1793): 1-2 - Female - Habitus; 3-4 - Mandible; 5 - Male - Head front view; 6 - Rhynchium haemorrhoidale haemorrhoidale (Fabricius, 1775): Female - Habitus.