
ant Seine 
THE INSECT WORLD. 
INTRODUCTION. 
‘ is not intended here to thoroughly investigate the anatomy 
‘Insects ; but, as we are about to speak of the habits and economy 
certain created beings, it is necessary first to explain the 
meipal parts of their structure, and the stage 
fect insect or zmago has under 
ite. 
8 which every 
gone before arriving at that 
We therefore proceed to explain, as simply as may be, the 
atomy of an insect, and the functions of its organs. 
If we take an insect, and turn it over 
e first thing that strikes us is that it is divided into three parts : 
e head; the thorax, or chest; and the abdomen, or stomach. 
The head (Fig. 1) is a kind of box, formed of a single piece, 
ving here and there joints more or less strongly marked, some- 
Ges scarcely visible. It is furnished in front 
th an opening—often very small—which 
the mouth; and with others for the eyes, 
d for the insertion of the antenne, or horns. 
The integuments of the head are generally 
rder than the other parts of the body. It 
necessary that this should be so. Insects 
cen live and die in the midst of substances 
uich offer some resistance. 
erefore, tl] 
, and examine it carefully, 

Fig. 1.—Head of an 
It is necessary, wii 
hat the head be strong enough to over 
ice. The head contains the masticatory organs, which, frequently 
come such resist- 
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