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For Insects, Spiders & Their Kin
For the United States & Canada
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Genus Orussus

Orussus sp. - Orussus - male Orussus occidentalis ovipositing - Orussus occidentalis - female Sawfly? - Orussus occidentalis - female Parasitic Wood Wasp - Orussus minutus Orussidae, Parasitic Wood Wasp, lateral - Orussus minutus parasitic wood wasp - Orussus - female Female, Orussus thoracicus? - Orussus thoracicus - female O. thoracicus - Orussus thoracicus - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Orussidae (Parasitic Wood Wasps)
Genus Orussus
Explanation of Names
Orussus Latreille, 1796
the most species rich and widely distributed genus of the family, with 5 spp. in our area and ~30 total(1)
* Not yet in the guide: O. sayii (eastern: frons with white spots near eye, female with abdomen usually entirely dark brown to black)
Key to species by Vilhelmsen (2003).
mainly northern hemisphere: Holarctic (15 spp.), Oriental (6), Afrotropical (5), Australasian (1)(1)
Ectoparasites of woodboring insect larvae, usually Buprestidae (Coleoptera)(2)
Females use echolocation to locate hosts and hence oviposition is restricted to dry, barkfree wood(2)
Print References
Vilhelmsen, L. (2003). Phylogeny and classification of the Orussidae (Insecta: Hymenoptera), a basal parasitic wasp taxon. Zoological Journal of the Linnean Society, 139(3), 337–418. DOI: 10.1046/j.1096-3642.2003.00080.x
Internet References