Contributions to a Knowledge of the Hemipterous Fauna of St. Helena, and Speculations on its Origin.

Abstract

May 7 distance down, a wavy appearance, corresponding with the ridges into which the surface is raised.The stridulation is almost equally audible in water and air.As to its production by the living animal, Dr. Mobius states that it was heard by himself and Mr. Lloyd in the Hamburg Aquarium, and that it was made especially when the Palinuri were handled; he compares it to the sound produced by pressing the upper leather of a boot against a table-leg.I also heard the sound, and observed the movement of the antenna producing it, in a specimen brought alive to the Biological Laboratory of the School of Mines shortly after making my last communication.As Dr. Mabius observes, the sound cannot be produced in spirit specimens.These can, however, be again rendered vocal by soaking them for a longer or shorter time in water.