The winged insect differs considerably in form from its sub-aquatic condition.
In many of these insects, while most individuals of the species are wingless, winged specimens are now and then met with.
The cones, about the size of a small walnut, bear spirally arranged imbricated scales which subtend the three-angled winged seeds.
The very globe continually transcends and translates itself, and becomes winged in its orbit.
The male scales differ in form from the female; the adult male is winged, and is rarely seen.