Structure of an Insect. 



CHAPTER XXII. 



INSECTS. 



CLASS IV. Insecta. Insects, the most numerous and 

 the most highly organised of invertebrates are found 



FIG. 62. 



Generalised insect. Grasshopper^ showing the structure and composition 

 of an insect's body, a, head ; b, eye ; c, antenna ; d, thorax, foremost 

 segment ; e, foremost pair of legs ; f, middle segment of thorax ; 

 g-, foremost pair of wings ; k, second pair of legs ; i, hindmost seg- 

 ment of thorax ; /, posterior pair of wings ; k, femur of third pair of 

 legs ; /, tibia ; m, tarsus ; ab, abdomen. 



in almost every conceivable locality on the earth's 



