ANIMAL KINGDOM. 



129 



organs of sensation ; (2) the Thorax, or chest ; and (3) the 

 Abdomen, or lower part. The Thorax, again, is made 

 up of three portions, to each of which a pair of legs is 

 attached, for insects have invariably six legs, and to these 



Fig. 89. The Segments of an Insect. 



a, the head ; b, c, d, the Three Segments of the Thorax ; e, the Wings ; 

 f, the Abdomen ; g, one Wing folded when in repose ; h, Wing- 

 cases ; i, Antennae (feelers). 



are also attached the wings of such as possess them, as 

 most of them do. The division of the body will be best 

 understood by examining the annexed drawing (Fig. 89). , 

 Insects do not breathe through their mouths, but by 

 means of two great tubes (trachece) running along the 



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