(from the article `arthropod`) ...layer, the procuticle. In most terrestrial arthropods, such as insects and spiders, the epicuticle contains waxes that aid in reducing evaporative ...
The hard and usually darkened layer of the cuticle lying between the endocuticle and epicuticle.
exocuticle The outer layer of the procuticle of certain crustaceans and arthropods, which contains cuticulin, chitin, and phenolic substances that are oxidized to produce the dark pigment of the cuticle.