1) Arthropod genus 2) Genus vespula 
Vespula is a small genus of social wasps, widely distributed in the Northern Hemisphere. Along with members of their sister genus Dolichovespula, they are collectively known by the common name yellowjackets (or yellow-jackets) in North America. Vespula species have a shorter oculomalar space (shown in the figure below right) and a more pronounced ...
(from the article `wasp`) The most familiar social wasps in northern temperate regions are species of the genera Polistes, Vespa, or Vespula. Many are large and aggressive and ...
[n] - sometimes considered a subgenus of Vespa: social wasps
genus Vespula noun sometimes considered a subgenus of Vespa: social wasps