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Family Aulacidae - Aulacid Wasps

Aulacid wasp - Pristaulacus fasciatus - female 8014963 - Pristaulacus - female Pristaulacus? - Pristaulacus niger - female Pristaulacus - Pristaulacus foxleei - female Female wasp on Virginia Pine  - Pristaulacus - female Pristaulacus Wasp - Pristaulacus Aulacidae - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" - Parasitoid Wasps)
Superfamily Evanioidea (Aulacid, Ensign, and Gasteruptiid Wasps)
Family Aulacidae (Aulacid Wasps)
~30 spp. in 2 genera in our area(1), ~170 described spp. in 3 genera worldwide + about as many undescribed(2)
Resemble Gasteruptiidae, but our spp. are usually black with reddish abdomen, longer antennae, and two recurring veins in the front wing.

The genera are separated based on the following traits of wing venation:(2)

Aulacus - has a 2r-m vein and a longer 2-Rs+M vein.

Pristaulacus - lacks a 2r-m vein and has a shortened 2-Rs+M vein.
most of the world, more diverse in the tropics(2)
Adults usually found around logs where hosts occur
endoparasitoids of the wood-boring larvae of beetles (of several families, but mostly longhorns) and Xiphydria wood wasps(2)
Frequently mistaken for ichneumonid wasps as they often frequent dead standing trees, logs, woodpiles. Note "neck" between head and thorax and the high attachment point of the metasoma
Print References
Smith, A.S. 2008. Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera). Beitrage zur Entomologie 58: 267-355.
Works Cited
1.World catalog of the family Aulacidae (Hymenoptera)
Smith D.R. 2001. Contributions on Entomology, International 4: 263-319.
2.Aulacidae, by J.T. Jennings & A.R. Deans (in The Tree of Life Web Project)