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. 



Grasshopper, showing the structure and composition of an insect's body. 

 a, head ; , eye ; c, antenna ; rf, thorax, foremost segment ; f, foremost 

 pair of legs ; _/i middle segment of thorax ; g, foremost pair of wings ; 

 A, second pair of legs ; /', hindmost segment of thorax ; /', posterior pair 

 of wings ; /4r, femur of third pair of legs ; /, tibia ; m, tarsus ; al>, 

 abdomen. 



in almost every conceivable locality on the earth's 



I 2 



