CLASSES AND SUB-KINGDOMS. 



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SuB-KiiirGDOM Aetheopoda {Insects, Spidsrs, Centipedes, 

 Crabs, etc.). 



Class Insecta (beetles, bugs, butterflies, etc.). — Animals 

 whose bodies are made up of segments grouped together in 

 three regions, the head, thorax, and abdomen ; having three 

 pairs of jointed legs, and one or two pairs of wings, and 

 breathing air through openings in the sides of the body. 

 The word insecta comes from a Latin word, inseco, I cut into, 

 referring to the distinct separation of the body into regions. 



