PREFACE. XXVU 



l^asoning, which they who cultivate this engaging 

 science must hope rather to develope than to aug- 

 ment. An independent spirit, which prompted De- 

 Geer to refuse obsequious submission to the au- 

 thority even of Linnaeus, and an utter absence of 

 any partiality for nomenclature, seem, with a strong 

 natural feelinw for the observation and arrangement 

 of facts, to have been the principal causes of the 

 excellence of that work, to which the author must 

 refer those who may wish to enter perfectly into 

 the spirit of the following remarks. 



For the better understanding of any anatomical 

 terms that may be used, he would also recommend 

 the perusal of the article Bouchc, in the Dictmi- 

 naire d'Histoire Naturelle, now in the course of 

 publication at Paris, in which the reader will find 

 the structure of the mouths of insects explained 

 with great skill by M. Latreille. And by the study 

 of this article, with the further assistance of the 

 plates with which the Horas Entomologicae have 

 been adorned by the most able entomological artist 

 in existence, the author hopes that his ideas may 

 be followed sufficiently to prevent him from being 

 subject to misconstruction. 



