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Genus Trypoxylon

Keyhole wasp? - Trypoxylon politum Unidentified Wasp - Trypoxylon wasp - Trypoxylon frigidum - male Square-headed Wasp - Trypoxylon lactitarse Wasp   zoo 506 - Trypoxylon Unknown Hymenoptera - Trypoxylon Square-headed Wasp - Trypoxylon Trypoxylon
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)
No Taxon (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Crabronidae
Subfamily Crabroninae (Square-headed Wasps)
Tribe Trypoxylini
Genus Trypoxylon
Explanation of Names
Trypoxylon Latreille 1796
Numbers
29 spp. in 2 subgenera in our area (28 in the US, 16 in Canada)(1), >630 spp. worldwide(2)
Identification
The "notched" eyes and clavate (club-shaped) abdomen are very distinctive.
Range
worldwide and throughout NA(2)
Remarks
The "organ pipe mud dauber" (T. politum ) is the only species in this genus (in NA) that fabricates nests of mud. All other our species (the "keyhole wasps") nest in pre-existing tunnels like beetle borings, sealing the finished nest with mud. Paralyzed spiders are used as provisions in each cell. [Comment by Eric Eaton]
Trypoxylon parasites include Melittobia chalybii (Eulophidae), Cleonymus magnificus (Pteromalidae), Trychrysis doriae (Chrysididae), Sphaeropthalma (Mutillidae), Perithous divinator (Ichneumonidae), Megaselia (Phoridae), Anthrax spp. (Bombyliidae), Amobia distorta (Sarcophagidae), and some other members of these families(3)
Internet References