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Genus Dielis

Unidentified Scoliid wasp? Campsomeris? - Dielis plumipes wasp on thistle - Dielis plumipes Bug 051114 ID - Dielis plumipes - male Resin Bee? - Dielis plumipes - female Red and black wasp - Dielis dorsata - female Unknown wasp/hornet - Dielis dorsata - female large bee, not a queen - Dielis tolteca - female Cicada Killer? ID Please? - Dielis pilipes - 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 Scolioidea
Family Scoliidae (Scoliid Wasps)
Subfamily Campsomerinae
Genus Dielis
Synonyms and other taxonomic changes
Species were revised and keyed by Bradley (1928).(1)
Bradley (1928, 1957, 1964) treated Dielis as a subgenus of Campsomeris. Betrem (1962) investigated the type species of the genus. Argaman (1996) assigned generic status to Dielis, which was implicitly supported by Osten (2005).
The validity of generic status remains supported by Khouri, Gillung, & Kimsey (2022), though D. pilipes consistently fell within Xanthocampsomeris and well outside other Dielis.(2)
Explanation of Names
Dielis Saussure & Sichel, 1864
Numbers
6 spp. in our area(2)(3)
Identification
Forewing with 2 submarginal cells and 2 recurrent veins (venation shared with Pygodasis and Xanthocampsomeris). Most species of Dielis have pale setae on the body.


Overview of Females

Dielis dorsata: Abdomen with extensive orange on T2-3 and with pale fringe; wings dark. Range: Florida


Dielis pilipes: Abdomen with bright yellow bands on T1-T4; pronotum often with two small, yellow spots; collar of pronotum with pale, never brownish setae. Range: western US, east to just barely beyond the western and panhandle borders of Texas


Dielis plumipes confluenta: Abdomen with pale yellow on T1-T4 forming broad bands (esp. T2); collar of pronotum with deeply to faintly brownish setae. Range: central US south to the Texas panhandle, east to Ohio


Dielis plumipes fossulana: Abdomen with pale yellow on T1-T4 forming very narrow bands; collar of pronotum with deeply brownish setae. Range: southeastern US, west to east Texas, north to about North Carolina or Virginia


Dielis plumipes plumipes: Abdomen with pale yellow on T1-T4 forming broad bands (esp. T2); collar of pronotum with deeply to faintly brownish setae. Range: eastern US from North Carolina, west slightly into Tennessee and Kentucky, north to about Massachusetts

-no photo-
Dielis tejensis: Female unknown. Range: Texas


Dielis tolteca: Abdomen with extensive orange on more than T2-T4 and with distinct orange fringe from T2 and beyond; wings darkened. Range: western US, east to south-central Texas


Dielis trifasciata nassauensis : Abdomen with very narrow bright yellow bands on T1-T3 or -T4. Range: Florida


Dielis trifasciata trifasciata : Abdomen with extensive bright yellow on T1-3. Range: Florida


Overview of Males

Dielis dorsata: Abdomen with pale yellow bands on T1-T4; legs sometimes marked with pale yellow; pronotum with narrow yellow band; scutellum and poscscutellum with very narrow bands; clypeus black medially with pale yellow at the margins forming a Ʌ shape. Range: Florida


Dielis pilipes: Abdomen with yellow bands on T1-T5. Range: western US, east to just barely beyond the western and panhandle borders of Texas.


Dielis plumipes confluenta: Abdomen with broad, pale yellow bands on T1-T4 (esp. T3); pronotum, clypeus, and legs entirely black; black regions of abdomen with slight blueish reflections. Range: central US south to the Texas panhandle, east to Ohio


Dielis plumipes fossulana: Abdomen with narrow, pale yellow bands on T1-T4; pronotum, clypeus, and legs entirely black. Range: southeastern US, west to east Texas, north to about North Carolina or Virginia


Dielis plumipes plumipes: Abdomen with broad, pale yellow bands on T1-T4 (esp. T3); pronotum, clypeus, and legs entirely black; black regions of abdomen with slight greenish reflections. Range: eastern US, from North Carolina and western Tennessee and Kentucky north to about Massachusetts


Dielis tejensis: Abdomen with yellow bands on T1-T5. Range: Texas


Dielis tolteca: Abdomen with yellow bands on T1-T4; pronotum usually with distinct yellow band (may be absent in western specimens); legs sometimes yellow-marked. Range: western US, east to south-central Texas

Dielis trifasciata nassauensis : Abdomen with very narrow bright yellow bands on T1-T4; legs conspicuously marked with bright yellow; pronotum with distinct yellow band; scutellum and postscutellum with broad yellow bands; clypeus yellow with large median black region. Range: Florida


Dielis trifasciata: Abdomen with bright yellow on T1-T4; legs conspicuously marked with bright yellow; pronotum with distinct yellow band; scutellum and postscutellum with broad yellow bands; clypeus entirely yellow apart from a small median spot. Range: Florida
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.(4)
Bradley J.C. (1957) The taxa of Campsomeris (Hymenoptera: Scoliidae) occurring in the New World. Transactions of the American Entomological Society, 83: 65–77.(5)
Bradley J.C. (1964) Further notes on the American taxa of Campsomeris (Hymenoptera: Scoliidae). Entomological News, 75: 101–108.(6)
Osten T. (2005) Checkliste der Dolchwespen der Welt (Insecta: Hymenoptera, Scoliidae). Bericht der Naturforschenden Gesellschaft Augsburg, 62: 1–62.(7)
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.
2.The evolutionary history of mammoth wasps (Hymenoptera: Scoliidae)
Ziad Khouri, Jessica .P. Gillung, & Lynn S. Kimsey. 2022. bioRxiv preprint.
3.New Dielis species and structural dichotomy of the mitochondrial cox2 gene in Scoliidae wasps
Przemyslaw Szafranski . 2023. Scientific Reports, 13(1): 1-12 .
4.The Taxon Dielis (Hymenoptera: Scoliidae) and its Type
Betrem J.G. 1962. Entomological News, 73: 205–207.
5.The taxa of Campsomeris (Hymenoptera: Scoliidae) occurring in the New World
J. Chester Bradley. 1957. Transactions of the American Entomological Society, 83: 65–77.
6.Further notes on the American taxa of Campsomeris (Hymenoptera: Scoliidae)
J. Chester Bradley. 1964. Entomological News, 75: 101–108.
7.Checkliste der Dolchwespen der Welt (Insecta: Hymenoptera, Scoliidae)
von Till Osten. 2005. Bericht der Naturforschenden Gesellschaft Augsburg, 62: 1–62.