Nematus oligospilus. 8 Larval instar 1 immediately before ecdysis 9 Larval instar 3 immediately after ecdysis 10 Larval instar 6 feeding on a leaf of Salix humboldtiana 11 Frontal view of head of 6th larval instar 12 A sixth larval instar spinning its own cocoon 13 Pupa 14 A female ovipositing.

 
 
  Part of: Malag√≥n-Aldana LA, Francisco S, Smith DR (2017) On the natural history of the willow sawfly Nematus oligospilus (Hymenoptera, Tenthredinidae) inhabiting Salix humboldtiana, in Colombia. Journal of Hymenoptera Research 55: 189-199. https://doi.org/10.3897/jhr.55.11566