Fourth instar, head.

 
 
  Part of: Baine Q, Smith DR, Zakopyko B, Dickerson S, Looney C (2022) ´╗┐Host plant and immature stages of Setabara histrionica (MacGillivray) (Hymenoptera, Tenthredinidae). Journal of Hymenoptera Research 94: 1-11. https://doi.org/10.3897/jhr.94.93555