If we examine the abdomen by transmitted light, we shall see that the anterior two-thirds of the abdomen are translucent.

With a snip of the scissors we will cut off the posterior third, to which are relegated, reduced to the strictly indispensable, the organs necessary to the propagation of the species and the preservation of the individual.

The rest of the abdomen presents a spacious cavity, and consists simply of the integuments of the walls, except on the dorsal side, which is lined with a thin muscular layer, and supports a fine digestive canal, almost a thread.

This large cavity, equal to nearly half the total volume of the insect, is thus almost absolutely empty.

At the back are seen the two motor muscles of the cymbals, two muscular columns arranged like the limbs of a ~V~.