14 



FOOD OF FISHES. 



a, natural Dragon-fly j b, imitative Dragon fly. 



" It may be asked," he says, " upon what principle 

 of imitative art the different varieties of salmon-fly can 

 be supposed to bear the most distant resemblance to 

 any species of dragon-fly, to imitate which we are fre- 

 quently told that they are intended? Certainly no per- 

 ceptible similarity in form or aspect exists between 



