Vespula Thomson, 1869

Nguyen, Lien Thi Phuong, Vu, Thuong Thi, Daglio, Anthony & Wiśniowski, Bogdan, 2019, Taxonomic review and distribution of the genus Vespula Thomson, 1869 (Hymenoptera: Vespidae: Vespinae) from Vietnam, Zootaxa 4691 (3), pp. 279-285 : 280

Key to species of the genus Vespula Thomson, 1869 from Vietnam

Queens

1. First metasomal tergum raised basally with depression behind this elevation; occipital carina reaching base of mandible; metanotum with punctures; propodeum rugose.................................................................. 2

- First metasomal tergum not raised basally and without depression; occipital carina not extending to base of mandible; metanotum almost smooth, without punctures; propodeum almost smooth with some small sparse punctures, not coarsely rugose.............................................................................. Vespula flaviceps (Smith, 1870.

2. Punctures on mesoscutum dense, with inter-puncture distance equal to puncture diameter, denser on lateral margins; punctures on gena, mesoscutellum and metanotum dense and strong; propodeum coarsely rugose throughout, without punctures.......................................................................... Vespula koreensis ( Radoszkowski, 1887)

- Punctures on mesoscutum less dense, with inter-puncture distance greater than puncture diameter; punctures on gena, mesoscutellum and metanotum sparser and weaker; propodeum less coarsely rugose, with punctures between and interrupting rugae Vespula orbata ( Buysson, 1902)