BUTTERFLIES, MOTHS AND CICADAS 217 



mechanism of delicacy and power. It has no parallel 

 in the insect world ; its sound has no equal but that 

 of a steam whistle. Its component parts are those of 

 a musical instrument. The pale membrane is the 

 supporting structure ; the bars are the vibrating 

 strings ; the muscle is the motive power and the tooth 

 is the pointed finger that sounds the long refrain. 

 The whole mechanism is a wonderful example of 

 beauty, simplicity, and strength. It is the most 

 perfect and exquisite contrivance of its kind that I 

 have ever been privileged to see. 



