202 BERMUDA. 



instruments is divided into two partitions by a scaly 

 and triangular edge, seen from the under side of the 

 body ; each cell exhibits anteriorly a white and folded 

 membrane, and in the hollow part a stretched-out, 

 slender membrane, which Reaumur calls the mirrors. 

 If this part of the body be opened from above on each 

 side, there is seen another folded membrane, which 

 is moved by a very powerful muscle, composed of a 

 great number of straight and parallel fibres, extend- 

 ing from the scaly ridge; this membrane is the 

 timbale. The muscles, by contracting and relaxing 

 with quickness, act upon the timbales, stretching them 

 out or bringing them into their natural state, whereby 

 the sounds are produced, which, even after the 

 death of the animal, may be repeated by moving the 

 parts over each other in the manner they act whilst 

 alive. The Cicada Ormi, by puncturing the ehn, 

 causes it to discharge the saccharine fluid which has 

 been termed manna. 



All the homopterous hemiptera section feed only 

 upon the fluids of vegetables; the females have a 

 scaly ovipositor generally composed of three denticu- 

 lated plates, and lodged in a scabbard of two valves. 

 They use this instrument as a saw, to make notches 

 in vegetables, in order to deposit their eggs. Cuvier 

 divides this section into three families — Cicadaria, 



