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Obtedia, when it confifts as it were of 

 two parts, one of which furrounds the 

 head and thorax, and the other the ab- 

 domen. 



Incompkta ; in this they have wings 

 and feet, but are not capable of moving 

 them, as in mofl: of the Hymenop* 

 tera. 



Semicompleta ; thefe walk or run, but 

 have only the rudiments of wings. 



Completa, in which they immediate- 

 ly obtain the perfect form of the infecl:, 

 without undergoing any more change, 

 as in thofe of the Aptera clafs, except 

 only the Flea. 



The Bed Bug alfo belongs to this 

 clafs. 



The Spider undergoes frequent trans- 

 formations, though only in the colour 

 of its fkin. The cruftaceous infects, as 

 QrabS) LobJIerS) &c. yearly caft their 



fhells, 



