1. Chitin in insect cuticle <br>Subbaratnam Muthukrishnan, Yasuyuki Arakane, Mi Young Noh, Seulgi Mun, Hans Merzendorfer, Christina Boehringer, Benedikt Wellmeyer, Qing Yang, Mingbo Qu, and Lin Liu<br>2. Cuticular sclerotization in insects – A critical review<br>Manickam Sugumaran<br>3. Hardening and tanning of insect ootheca, egg cases, egg sac, chorion, and silk<br>Kaliappanadar Nellaiappan and Manickam Sugumaran<br>4. Insect multicopper oxidase-2: Molecular properties, roles in cuticle formation, and impacts on evolutionary success of insects<br>Tsunaki Asano<br>5. Diversity of melanin synthesis genes in insects<br>Ryo Futahashi, Shigeyuki Koshikawa, Genta Okude, and Mizuko Osanai-Futahashi<br>