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Family Orussidae - Parasitic Wood Wasps

Wood Wasp - Orussus occidentalis - male Sawfly? - Orussus occidentalis Orussus minutus - female Orussidae? - Orussus parasitic wood wasp - Orussus - female Orussus sp? - Orussus Female, Kulcania tomentosa? - Kulcania tomentosa - female Female, Kulcania tomentosa? - Kulcania tomentosa - female
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)
7 spp. in 3 genera in our area(1), 85 spp. worldwide(2)
8-14.5 mm(1)
Mesonotum divided by nearly straight, transverse groove between bases of fore wings, the groove separating from the mesoscutum a triangular area (axilla) on either side of scutellum. Head with crown of backward-pointing teeth around median ocellus. Abdominal tergum 1 not divided medially. Abdominal terga evenly rounded at sides. Front wing with a single submarginal cell; antennae inserted below the eyes, just above the mouth(3).
Larvae are ectoparasitoids of xylobiontic insect larvae, primarily of Buprestidae, but also of Cerambycidae, Xiphydriidae & Siricidae(2)
relatively rare
Print References
Middlekauff, W. W. (1983). A revision of the sawfly family Orussidae for North and Central America (Hymenoptera: Symphyta, Orussidae). University of California Press.
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Discovery of new species confirms Oriental origin of Orussus Latreille (Hymenoptera: Orussidae)
Vilhelmsen L., Blank S.M., Liu Z., Smith D.R. 2014. Insect syst. evol. 45: 51–91.
3.A Field Guide to Insects
Richard E. White, Donald J. Borror, Roger Tory Peterson. 1998. Houghton Mifflin Co.