Diagram of insect wing venation. Redrawn with modifications from Chapman (fig. 9) [1].
The veins are named according to system of Comstock and Needham [2] modified by Wootton [3].
On the right side of the diagram there is a section across the wing. The section was made along the line marked with arrows. It shows, in exaggerated way, corrugation of the wing.

References

1. Chapman R.F.
   (1998) The insects: structure and function. Cambridge University Press, Cambridge, pp. 788.
2. Comstock J.H., Needham J.G.
   (1898) The wings of insects. American Naturalist 32:43-903.
3. Wootton R.J.
   (1979) Function, homology and terminology in insect wings. Systematic Entomology 4:81-93.