l6 INTRODUCTORY REMARKS. 



Entomologic{h), though not distinguished by his 

 usual mark the asterisk, are * aculeo miti, * * a- 

 ciileo jmnctorio. The former division including 

 Cyyiips, Tenthredo, Sirex, Ichneumon, and the 

 latter the remaining genera. 



The parts he uses in his definitions of the genera 

 of this class, are 1. The Proboscis (c). 1. The ab- 

 sence of it{d). 3. The absence of the Tongue {e). 

 4. The Palpi if). 5. The Maxill,c{g). 6. The 

 Antenme both with respect to form and number of 

 articulations (A). 7. The Thorax {i). 8. The Scu- 

 tellum(k). C). The Wings {I). \0. The Abdo7nen{m). 

 11. The y4culeus{n). 12. Pubescence (o). 13. The 

 absence ofit{p). 14. Colour (q). To distinguish 

 his families he has recourse to the Antennce{r), 

 Abdomen [s), Hirsuties {t) , and Colour [u) The 

 number of species described in the twelfth edition 

 of the Sy sterna Natunc in this class is 314. 



Having given this short account of the labours 

 of Linneus in this class, I shall bestow a few page^ 

 upon what his successors have attempted with the 



(^) Hymenoptera (dist'mguuntur) secundum aculeuvi punc^ 

 iorium vel mitem. Fuudament. Entomol. 4to. p. 29. 



(c) Apis. (d) Cynips, Tenthredo, Chrysis, Vespa. 



(e) Ichneumon, Sphex. (f) Sirex. (g) All except 



Formica and Mutiila. (h) Sirex, Ichneumon, Sphex, Chrysis, 



(i) Mutiila. {h) Tenthredo. (/) Tenthredo, Sirex, 



Sphex, Fespa, Apis, Formica. (.?«) Sirex, Ichneumon, Chrysis, 



(w) All the genera. (0) Mutiila. (p) Fespa. (q) Chrysis. 



(r) Tenthredo, Ichneumon. {s) Ichneumon. {t) Apis. 



{21) Ichneumon, 



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