Immature stages of a wasp, Oomyzus gallerucae, a parasite of eggs of elm leaf beetle, Xanthogaleruca luteola. An egg (bottom left), first instar (top left), and last instar. Credit: F. Silvestri 1910. Bollettino del Laboratorio di Zoologia Generale e Agraria Della Facolt Agraria in Portici. 4:246-288 Licensed under a Creative Commons Attribution-Noncommercial 3.0 License
