Part of the stridulatory apparatus that is moved along the file (pars stridens) to produce a sound.
"A scraper on the fore wing of a bush-cricket, true cricket or mole-cricket, which is rubbed againbst a file on the other ofre wing during singing. 
- . The Songs of the Grasshoppers and Crickets of Western Europe. Colchester, Essex: Harley Books; 1998.
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