PREFACE. 



stand to what parts they referred, but in 

 names alone has he availed himself of their 

 labours ; the facts, the descriptions, are en- 

 tirely his own. For one chapter, that on 

 the Organs of Circulation, he is indebted to 

 Mr. Bowerbank : by means of that gentle- 

 man's splendid microscope he made the obser- 

 vations therein recorded. Mr. Bowerbank's 

 account of the same observations has been 

 given in the Entomological Magazine, (vol. i. 

 p. 239) : his account and the Author's some- 

 what differ, but not sufficiently to cause the 

 slightest doubt of the correctness of either, 

 in the mind of a candid reader. The differ- 

 ences are those of opinion only. 



The Third Book, entitled Classification of 

 Insects, may be charged with being too ori- 

 ginal : it may be said that the Author should 

 have given the views and arrangements of 

 others in preference to his own. He would ask, 



