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 RF. The insects: structure and function. Cambridge: Cambridge University Press; 1998.
2. Comstock JH, Needham JG. "The wings of insects." American Naturalist. 1898;32:43-903.
3. Wootton RJ. "Function, homology and terminology in insect wings." Systematic Entomology. 1979;4:81-93.