Nematus oligospilus, ♀, reared from immatures collected on Salix humboldtiana (Salicaceae) in Bogotá, Colombia. 1 Dorsal view 2 Lateral view 3 Ovipositor sheath, lateral view 4 Vertex with a conspicuous black spot 5 Vertex with a reduced black spot 6 Housed specimens at the Entomological Museum UNAB (Catal. Number 733).

  Part of: Malagón-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.