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 Sphecius grandis - Western Cicada-killer Wasp

A clearer image of one of the cicada killers - Sphecius grandis - male Western Cicada Killer? - Sphecius grandis Unknown wasp? - Sphecius grandis Western Cicada Killer - Sphecius grandis Unknown Wasp 2295 - Sphecius grandis It looks like a yellow and black vespid but has much vivid red as well - Sphecius grandis Possible hybrid Western x Eastern Cicada Killer - Sphecius grandis Wasp1July2020BigPine,CA - Sphecius grandis
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)
No Taxon (Apoidea (minus Anthophila) - Apoid Wasps)
Family Crabronidae (Square-headed Wasps, Sand Wasps, and Allies)
Subfamily Bembicinae
Tribe Bembicini (Sand Wasps)
Subtribe Spheciina
Genus Sphecius (Cicada-killer Wasps)
Species grandis (Western Cicada-killer Wasp)
Synonyms and other taxonomic changes
Sphecius grandis (Say, 1823)
Orig. Comb: Stizus grandis Say, 1823
Punctation density in the middle of T1 and T2 is approximately equal in S. grandis (photo below). This is noticeably less dense on T2 compared to T1 in S. convallis.(1)

Antennal segments II-IV are curved ventrally (at the tyloids/ sensory organs) in S. grandis, so the segments looking more bead-like (photo below). In S. convallis antennal segments II-IV are not curved ventrally, and are tube-like.(1)

Specimens often, but not always, have more extensive yellow markings than in S. convallis.(1)
w. US to c. TX (CA-TX-NE-WA) / s. to C. Amer. - Map (2)
Adults feed on nectar. Females hunt cicadas to provision their offspring.
Print References
Holliday, C.W., and J.R. Coelho. 2006. Improved Key to New World Species of Sphecius (Hymenoptera: Crabronidae). Ann. Entomol. Soc. Am. 99(5):793-798.
Works Cited
1.Improved key to New World species of Sphecius (Hymenoptera: Crabronidae)
Holliday C.W., Coelho J.R. 2006. Ann. Ent. Soc. Am. 99: 793-798.
2.Global Biodiversity Information Facility (GBIF)