Vespula is a small genus of socialwasps, widely distributed in the Northern Hemisphere. Along with members of their sister genusDolichovespula, they are collectively known by the common nameyellowjackets (or yellow jackets) in North America. Vespula species have a shorter oculomalar space (shown in the figure below right) and a more pronounced tendency to nest underground than Dolichovespula.
Notable species
While most species of this genus inhabit North America, four Vespula species inhabit Europe, namely V. austriaca, V. germanica, V. rufa, and V. vulgaris.
Two common European species, the German wasp (V. germanica) and the common wasp (V. vulgaris), have established in other countries; both species are now found in New Zealand, Australia, and South America, while the former has also been introduced in South America, and the latter in Southern Africa.
^Jacobson, R. S.; Matthews, R. W.; Macdonald, J. F. (1978-05-15). "A Systematic Study of the Vespula vulgaris Group with a Description of a New Yellowjacket Species in Eastern North America (Hymenoptera: Vespidae)1". Annals of the Entomological Society of America. 71 (3): 299–312. doi:10.1093/aesa/71.3.299. ISSN0013-8746.
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p.306, "Yellowjacket venom consists mainly of three proteins: antigen 5, hyaluronidase, and phospholipase."
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p.307, "The venom phospholipases isolated from the three species of yellowjackets in this report were found to be immunochemically indistinguishable from each other using sera from rabbits immunized with venom from a single species of yellowjacket. Similar findings were obtained with antigen 5."
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p.304, "Identical concentrations of phospholipase-specific antibodies were obtained with immunosorbents containing phospholipase from any of the three species of yellowjackets. This was also the case for antigen 5-specific antibodies. ... The above results indicate that antigen 5s as well as phospholipases from these three species of yellowjackets are antigenically indistinguishable. The findings were confirmed by immunodiffusion. Lines of identity were observed when antigen 5s, or phospholipases, from the three species of yellowjackets were tested with rabbit anti-serum specific for V. maculifrons venom (results not shown)."