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

Species Ibalia anceps

Ibalia anceps - female Ibalia anceps - female Ibalia - Ibalia anceps Ibaliidae - Ibalia anceps - female wasp on maple tree - Ibalia anceps Mystery Sawfly - Ibalia anceps Ontario Ibalia - Ibalia anceps Ibalia anceps
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" (parasitoid Apocrita))
Superfamily Cynipoidea
Family Ibaliidae (Ibaliid Wasps)
Genus Ibalia
Species anceps (Ibalia anceps)
Synonyms and other taxonomic changes
=scalpellator Westwood 1837
Explanation of Names
Ibalia (Tremibalia) anceps Say 1824
predominantly yellow with black markings on head, thorax, and abdomen; first hind tarsal segment longer than remaining segments combined; 2nd hind tarsal segment has long apical process extending to tip of 4th tarsal segment; abdomen compressed laterally (almost knife-like) and longer than head and thorax combined; antenna 13-segmented in female, 15-segmented in male; forewing mottled with brown spots (3 morphs of I. anceps are recognized, each morph differing in wing color pattern)
larvae: see(1)
e. US & se. Canada (NS-ON-WI-CO to FL-TX)(2)
adults may be seen ovipositing on hickory trees, inside which larvae of Tremex horntails are present
larvae parasitize larval Tremex (Siricidae)(2)
See Also
The only other eastern species, I. leucospoides, has a black head and thorax, and an unmarked dark red abdomen.
Works Cited
1.Comparative morphology of terminal-instar larvae of Cynipoidea: phylogenetic implications
J.L. Nieves-Aldrey, H. Vårdal, F. Ronquist. 2005. Zoologica Scripta 34: 15–36.
2.A review of the siricid woodwasps and their ibaliid parasitoids (Hymenoptera: Siricidae, Ibaliidae) in the eastern United States
Smith D.R., Schiff N.M. 2002. Proc. Ent. Soc. Wash. 104: 174-194.