ORDERS OF INSECTS. 



no 



Make a table of differences among the seven orders 

 of insects, according to the following form : — 



Make a table of resemblances among the seven 

 orders of insects, after the following form : — 



3 compound eyes 



1 pair of antennae 



2 pairs of jaws 



2 pairs of wings 



3 pairs of legs 

 jointed appendages 

 segmented abdomen 

 3 body divisions 

 17 body segments 

 breathe by spiracles 

 reproduce by eggs 

 double nerve cord and ganglia 

 chitinous exoskeletou 

 white blood 



Grasshopper 



House fly 



Butterfly • 



Beetle 



Giant water bug 



Dragon fly 



Bumblebee 



with the one on page 31 

 in that table are omitted 



m 



Compare this table 

 What characters found 

 this one? 



Orders which are alike constitute a class. These 

 seven orders agree in the many characteristics ex- 

 pressed in the table of resemblances. They constitute 

 a class. The name of this class is Insecta. An in- 

 sect, then, is an animal having all the characteristics 



