C 
CHARACTERISTICS OF INSECTS : 
ally means the loss of time and money in attempting unsuitable remedics 
or neglecting good opportunities. 
Characteristics of Insects 
The place of insects in the animal world is in a group known as 
Arthropoda, a word meaning “ jointed foot.” They are related on the 
one hand to spiders, scorpions, and cen- 
tipedes, and on the other to crabs, 
crayfish, and the other crustaceans. 
With these animals they have various 
points in common; for example, a hard- 
‘ ) 
ened body wall or “ external skeleton,’ 
jointed legs occurring always in pairs, 
and a body made up of distinct rings or 
scgments. 
Other characteristics are peculiar to 
A mite. <An_ar- 
thropod, related to insects. 
insects alone, and serve to define them. Fria. 1. 
These are as follows: a body composed ; 
ae i Enlarged and natural size. 
of three distinct regions, head, thorax, Original. 
and abdomen; one pair of compound 
eyes; one pair of antenna, or ‘“feclers”’; three pairs of legs; two 
pairs of wings; and a peculiar, complicated type of growth, called 
metamorphosis, by which the individual goes through three or four 
unlike stages in its life round. 
