vi PREFACE. - 



first place, in the Introductory Remarks, and Ad- 

 denda to the first volume, he has given some ac- 

 count of the rise, progress, and present state of the 

 class Hymenoptera ; and pointed out such improve- 

 ments, as he thinks it will admit : he then proceeds 

 to examine what advances the s:enus of which he 

 proposes to treat has made towards perfection. 

 Under each of these heads he has introduced some 

 strictures upon the system of Fabricius, which the 

 occasion seemed to demand: and here he hopes 

 that the friends and admirers of that celebrated 

 entomologist will do him the justice to believe that 

 he has been actuated solely by a desire to promota 

 the cause of truth, and of his favorite science, 

 which, as he conceives, have suffered very materi- 



iMk. ally by the introduction of that system. 



The work itself begins with a Tabula synoptCca 

 nomenclaturce partium. Upon the construction of 

 this the author has bestowed the greatest attention ; 

 and he trusts that it will be found nearly, if not 

 altogether, a complete enumeration of the external 

 parts of the insects of which he treats. Their in- 

 ternal anatomy he has passed over, as not entering 

 within the limits of his plan. This table, if he is 

 not greatly mistaken, with a few slight alterations, 

 may be made to agree with all Hymenopterous in- 

 sects. In it he has introduced and named several 

 parts unnoticed by Linneus, and most other wri- 

 ters in entomology. This is followed by an ex- 

 planation of the terms used in this table, and the 



following 



