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Genus Vespula - Ground Yellowjackets

Vespula squamosa - female Yellowjacket - Vespula germanica - female YJ - Vespula squamosa - female Vespula consbrina nest from my attic - Vespula consobrina Vespula - Vespula pensylvanica Vespinae - Hornets and Yellowjackets - Vespula vidua Query Aerial Yellowjacket - Vespula germanica Western yellowjacket  - Vespula pensylvanica - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Vespoidea
Family Vespidae (Hornets, Yellowjackets; Paper, Potter, Mason, and Pollen Wasps; and Allies)
Subfamily Vespinae (Hornets and Yellowjackets)
Genus Vespula (Ground Yellowjackets)
Explanation of Names
Vespula Thomson, 1869
Numbers
Thirteen species of Vespula in North America (twelve native, and one exotic, V. germanica).
Identification
Overview of Species of Vespula

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For keys to species see:
Key to the ten eastern (plus one adventitious western) species in the Identification Atlas of the Vespidae of the northeastern Nearctic region (1).

Nests
1. V. alascensis, 2. V. consobrina, 3. V. flavopilosa, 4. V. germanica, 5. V. maculifrons, 6. V. pensylvanica, 7. V. squamosa
Internet References
Fact sheet (Grissell & Fasulo 2013)(2)
Works Cited
1.Identification Atlas of the Vespidae (Hymenoptera, Aculeata) of the Northeastern Nearctic Region
Matthias Buck, Stephen A. Marshall, and David K. B. Cheung. 2008. Biological Survey of Canada [Canadian Journal of Arthropod Identification].
2.University of Florida: Featured Creatures