The organ is the tymbal, a mesh of miniature ribs set into a hard membrane on each side of a hollow abdomen; the cicada strums it with its flight muscles, too fast to hear as separate vibrations, and gets close to a jet engine out of it. A locust rubs its legs on its wings. A cicada, Popova notes, sings the way we do — with the whole body. Read through Anna Botsford Comstock’s 1903 field guide.