Reference

G. Köhler, Steffen Roth, Klaus Reinhardt (2009): Ten Instars in the Leprous Grasshopper, Phymateus leprosus (Fabricius, 1793) (Caelifera: Pyrgomorphidae): Maximum Number Recorded in the Acridoidea – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 56: 17 - 24.