In a cockroach : The first pair of wings (forewings or tegmina) are not transparent and prothoracic in origin, as stated in Statement I. Instead, they are opaque, dark, leathery and originate from the mesothorax. The second pair of wings (hind wings) are not opaque, leathery and mesothoracic in origin, as stated in Statement II. Instead, they are transparent, membranous and originate from the metathorax.