INSECTS. 
47 
formed on the same plan, and that is why we place 
them in one class. 
4 . “ Now look at some of the specimens. If you 
take notice you will see that every insect is made 
up of three distinct 
parts — head, chest, 
and abdomen. 
“ The divisions 
between these parts 
are so plain that it 
appears as if the 
insect were cut 
almost through in 
two places. That 
is why it is called 
‘insect’, for the word 
means ‘ cut into 
5. “I see the three 
Diagram showing the parts of Insects. 
a, Head; b, chest; c, abdomen; dd, wing-cases; 
ee, wings; //, feelers. 
parts quite cleaily. 
said Arthur, “ and 
I notice that the 
legs and wings are always on the middle part.” 
“Yes,” added William; “but do you observe the 
number of legs. Each insect has six. I have 
counted them on ever so many, and the number 
is always the same.” 
6. “ Quite right, William,” said Mr. Johnson. 
“ Now if you look very closely you may find that 
the middle and hinder parts of an insect are made 
