Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Triscolia ardens

Wasp - Triscolia ardens black and orange wasp - Triscolia ardens - female ?mutillid - Triscolia ardens Scoliid on Milkweed from southern Chiricahua Mnts - Triscolia ardens - male - - Triscolia ardens - female large velvet ant? - Triscolia ardens - female Scolia sp.? - Triscolia ardens Triscolia ardens? - Triscolia ardens
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 Scoliinae
Genus Triscolia
Species ardens (Triscolia ardens)
Other Common Names
Fire-tailed Scoliid Wasp
Explanation of Names
Triscolia ardens (Smith 1855)
up to about 30 mm, noticeably larger than S. dubia haematodes
Forewing with three submarginal cells and a single recurrent vein which meets the posterior edge of the 2nd submarginal cell (see diagram here).(1) Wings very dark, violaceous; thorax entirely black; first two abdominal tergites mostly black, the remaining (posterior) tergites red and more bushy-hairy.(2)
Males have a pseudostinger with three narrow spines projecting slightly beyond the tip of abdomen; females lack such spines.
TX, NM, AZ, CA; and south into Mexico.(2)(3)
Desert, e.g. the Mojave and Colorado deserts of California(4)
June to November
Triscolia ardens is presumably the model for the dipteran mimic Mydas ventralis.
See Also
Scolia dubia haematodes is nearly identical in coloration but is separated in terms of wing venation and a smaller size.

Comparison of wing venation between Scolia (left) and Triscolia (right). The genus Scolia has 2 submarginal cells whereas the genus Triscolia has 3 submarginal cells.
Print References
Betrem J.G., Bradley J.C. (1964). Annotations on the genera Triscolia, Megascolia and Scolia (Hymenoptera, Scoliidae). Zoologische Mededelingen 40: 89-96. (Full text)
Works Cited
1.Grissell (2013): Scoliid Wasps of Florida
2.Scoliid Wasps of the Southwestern United States
MacKay W.P. 1987. Southwestern Naturalist 32(3): 357-362.
3.Catalog of Hymenoptera in America North of Mexico
Karl V. Krombein, Paul D. Hurd, Jr., David R. Smith, and B. D. Burks. 1979. Smithsonian Institution Press.
4.The Scoliidae of California
Hurd P.D. 1952. Bull. Calif. Insect Survey 1(6): 141-152.