Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Nearctic sawflies. IV. Allantinae: Adults and larvae (Hymenoptera: Tenthredinidae)
By Smith D.R.
Agricultural Research Service, USDA Technical Bulletin No. 1595. 172 pp., 1979
Cite: 484785

link update
This link now seems to get you to the full text; as far as I could tell, Google wasn't posting it all.