INSECT STRUCTUKE. 



If we take a caterpillar and examine it we find the following- parts : — 



The head is rounded, broadly attached to the body ; the mouth is 



situated on the lower side with a complex arrangement of jaws ; small 



THO'RA X 



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nooTH 



i-fs 



^/ > 



iTi^Acie 



fce-r 



Fig. 5. 



eyes are set in a half circle on each side of the head ; and we may dis- 

 cern a pair of small feelers called antenna. Behind the head are three 

 segments (a ring" and the contents are called a segment), each having- a 

 pair of small jointed leg-s below : there are short or long- hairs on each 

 segment, and the first segment often has a small oval shield just behind the 

 upper part of the head. These three segments together form the thorax. 

 Behind the thorax are eight segments (which form the aid omen) ^ 



HEAD 



ANTENNA 



> 



THORAX. • 



ABDOMEN 



MOUTH 



SPIRACLE. 



SUCKER FEET 



.SPIRACLE 



Fig. 6. 

 JHagrc^m of Caterpillar. 



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