32 INTRODUCTORY REMARKS. 



this head I purpose speaking more at large here- 

 after. Gmelin has considered the Fahrician genus 

 Evania as a family of Spliex ; Bemhex and Crahro 

 as subdivisions of Vespa ; and Andreiia and JSo- 

 mada of Apis. The number of species noticed by 

 him from various authors in this class is 1241, but 

 the same insect, if I am not mistaken, often re- 

 appears under a new name. 



It now remains that I offer a few observations 

 upon the Linnean and Fahrician genera, so that, 

 upon a comparison, the merits or defects of each 

 may be readily perceived ; and then conclude my 

 remarks upon this class, by suggesting some im- 

 provements of which it seems capable. 



Linneus has given only ten genera in this class. 

 Of these, Cynips, Tenthredo, Sir'ex[z), Chrysis, 

 Formica, and Mutilla, seem to be natural genera, 

 that admit of little alteration. If those species were 

 excluded from Apis and Vespa, which do not agree 

 with Linneus's character, they would justly claim 

 the same appellation. The present definition of 

 Ichneumon, if we rigidly adhere to :t, will exclude 

 those leoritimate Ichneumons that have not an 

 exerted aculeus. This genus requires to have 

 nearly the whole family of the Minuti, and some 

 others separated from it. Sphex, as it now stands, 

 is not a natural genus, but rather, like the Elongata 

 ' family in Chrysomela, a receptacle for the rejecta- 



f%) I know but few of the LinneaB species of this genus, of 

 course I cannot speak positively concerning it. 



menta 



