6 



Tniddle of the pronotum is called the median carina. The form 

 and structure of this piece are of great importance in classifica- 

 tion. 



The mesothorax, or middle thorax, has the second pair of legs 

 attached to its under side, and the first pair of wings, or fore wings, 







Fig. 2. 



attached to its upper side. These fore wings are of a denser text- 

 ure than the hind wings, and are often called wing covers^ elytra 

 or tegmina. 



The metathorax has the hind legs attached to its under side, and 

 the hind wings, or true organs of flight, attached to its upper side. 



