Note 3 — Chapter XIII · THE WHITE-FACED DECTICUS: THE INSTRUMENT OF SOUND
Alexander Teixeira de Mattos translation
Various Beetles produce a noise by sliding one rugged surface over another. The Capricorn moves his corseleted segment over its junction with the rest of the thorax; the Pine Cockchafer,3 with his great fan-shaped antennæ, rubs his last dorsal segment with the edge of his wing-cases; the Copris4 and many more know no other method. To tell the truth, these scrapers do not produce a musical sound, but rather a creaking like that of a weathercock on its rusty pin, a thin, sharp sound with no resonance in it.