Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Eriotremex formosanus - Asian Horntail Wasp

Ichneumonid? - Eriotremex formosanus - female Eriotremex formosanus - female Found on a downed tree - Eriotremex formosanus Found on a downed tree - Eriotremex formosanus Hymenoptera - Eriotremex formosanus - female Eriotremex formosanus - female wasp of some kind - Eriotremex formosanus Horntail sp. (2nd photo) - Eriotremex formosanus
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 Siricidae (Horntails)
Subfamily Tremecinae
Genus Eriotremex
Species formosanus (Asian Horntail Wasp)
Synonyms and other taxonomic changes
Eriotremex formosanus (Matsumura)
Orig. Comb: Tremex formosanus Matsumura 1912
Antennae short, blunt, black; abdomen with long yellow hairs on dorsum (1)
TX-FL-VA, mostly close to the coast (+ UT & AR records) (1)(2),(Warriner 2008)
native to SE Asia, adventive in our area
hardwoods (oak, hickory, sweetgum, probably others) (1); attacks mostly dead/dying wood, so not a serious pest
introduced accidentally with wood (crates, etc.); first reported in 1975 (Warriner 2008)
Print References
Warriner, M.D. 2008. First record of the Asian horntail Eriotremex formosanus (Hymenoptera: Siricidae) in Arkansas, U.S.A. Entomological News 119: 212-213. Full PDF
Works Cited
1.Guide to the siricid woodwasps of North America
Schiff N.M., Valley S.A., LaBonte J.R., Smith D.R. 2006. USDA Forest Service, Forest Health Technology Enterprise Team, Morgantown, WV. 101 pp.
2.Siricidae (Hymenoptera: Symphyta: Siricoidea) of the Western Hemisphere
Schiff, N.M., Goulet, H., Smith, D.R., Boudreault, C., Wilson, A.D., and Scheffler, B.E. 2012. Canadian Journal of Arthropod Identification No. 21: 305 pp.