The cockroach has three pairs of jointed appendages and two pairs of wings.The forewings are mesothoracic and are called wing covers or tegmina or elytra. These wings are anteriorly present. They cover the hindwings and are protective in function. These are dark stiff opaque and leathery.The hind wings are large, thin, membranous and transparent. They are kept folded below the tegmina and are used for flying.So the correct answer is 'Elytra'.