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BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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

National Moth Week 2020 photos of insects and people.

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

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

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Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

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Genus Crossocerus - Equilateral Square-headed Wasps

Square-headed Wasp - Crossocerus nitidiventris - female Square-headed Wasp - Crossocerus Crossocerus sp.? - Crossocerus Red bodied Hymenopteran - Crossocerus all black Crabroninae - Crossocerus Crossocerus? - Crossocerus Wasp? - Crossocerus impressifrons Crabronid - Crossocerus
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 (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Crabronidae
Subfamily Crabroninae (Square-headed Wasps)
Tribe Crabronini
Subtribe Crabronina
Genus Crossocerus (Equilateral Square-headed Wasps)
Synonyms and other taxonomic changes
New World fauna revised in (1)
Explanation of Names
Crossocerus Lepeletier de Saint Fargeau & Brullé 1835
40 spp. in our area(2), ~250 worldwide(3)
Distinguishing from similar genera (Crabro, Ectemnius, Lestica)(4):
Ocelli form an equilateral triangle
Orbital foveae absent