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Genus Dielis

Campsomeris dorsata Focus Stack - Dielis dorsata - female wasp - Dielis plumipes - female Good-sized wasp - Dielis tolteca - female Wasp 3 - Dielis plumipes - female Perhaps a scolid wasp? - Dielis plumipes At a loss...fuzzy wasp in Florida on Horsemint - Dielis trifasciata - female presumably Dielis tolteca - Dielis tolteca - female Black and yellow wasp swarming low to ground--Vespula? - Dielis pilipes - male
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 Scolioidea
Family Scoliidae (Scoliid Wasps)
Subfamily Campsomerinae
Genus Dielis
Synonyms and other taxonomic changes
Dielis was described by Saussure & Sichel (1864). Nearly a century later, Bradley (1957, 1964) treated Dielis as a subgenus of Campsomeris. Further, Betrem (1962) investigated the type species of the genus. Argaman (1996) assigned generic status to Dielis, which was implicitly supported by Osten (2005).

Campsomeris (sensu stricto) is a Neotropical genus and does not occur in the USA and Canada.
Explanation of Names
Dielis Saussure & Sichel, 1864
Five species occur north of Mexico:

1. Dielis dorsata (Fabricius, 1787)
2. Dielis pilipes (de Saussure, 1858)
3. Dielis plumipes (Drury, 1770)
4. Dielis tolteca (de Saussure, 1857)
5. Dielis trifasciata (Fabricius, 1793)

Refer to Bradley (1928) for a revision of the genus.(1)
Print References
Argaman, Q. (1996) Generic synopsis of Scoliidae (Hymenoptera, Scolioidea). Annales Historico-Naturales Musei Nationalis Hungarici, 88: 171–222.

Betrem, J.G. (1962) The taxon Dielis (Hymenoptera: Scoliidae) and its type. Entomological News, 73: 205–207.

Bradley, J.C. (1957) The taxa of Campsomeris (Hymenoptera: Scoliidae) occurring in the New World. Transactions of the American Entomological Society, 83: 65–77.

Bradley, J.C. (1964) Further notes on the American taxa of Campsomeris (Hymenoptera: Scoliidae). Entomological News, 75: 101–108.

Osten, T. (2005) Checkliste der Dolchwespen der Welt (Insecta: Hymenoptera, Scoliidae). Bericht der Naturforschenden Gesellschaft Augsburg, 62: 1–62.

Saussure, H. de & J. Sichel (1864) Catalogue des espèces de l’ancien genre Scolia, contenant les diagnoses, les descriptions et la synonymie des espèces, avec des remarques explicatives er critiques. Henri Georg & V. Masson et Fils, Genève & Paris, 350 pp.
Works Cited
1.The species of Campsomeris of the Plumipes Group, inhabiting the United States, the Greater Antilles, and the Bahama Islands
Bradley, J.C. 1928. Proceedings of the Academy of Sciences of Philadelphia 80: 313-337.