Fig. 16 from Insects, their way and means of living, R. E. Snodgrass. [1]

A grasshopper, Mecostethus gracilis, that makes a sound by scraping sharp ridges on the inner surfaces of its hind thighs over toothed veins of the wings.

• A, the male grasshopper.
• B, left front wing; the rasping vein is the one marked I.
• C, a part of the rasping vein and its branches more enlarged, showing rows of teeth

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See Category:Snodgrass for the reasoning for using this tag.