54 



FIRST BOOK OF ZOOLOGY. 



some, the legs will be closely drawn to the body, but by 

 sharp looking they will be found. 



After studying these carefully, the pupil will observe 

 that those insects which have three pairs of legs have the 

 body divided into three regions, or parts, called respectively 

 the heady thorax, and abdomen, and that, with few excep- 

 tions, they all have wings. Insects having these characters 

 are called Insects proper. They are also called Hexapods, 

 a word meaning six legs. 



These are to be studied first. The other animals col- 

 lected may be saved for future study. 



51. Some insects have the three parts of the body dis- 

 tinctly separated, as in the ants, flies, and wasps. In other 

 insects the parts of the body are very close together,- so that 

 it is difficult to distinguish the dividing line, as in certain 

 beetles. Let the pupils examine each insect, and make out 

 the head, thorax, and abdomen. 



"> head. 



Insect with the head, thorax, 

 and abdomen, distinctly 

 separated. 



Insect with the head, thorax, 

 and abdomen, close to- 

 gether. 



thorax. 



abdomen. 



abdomen. 



FIG. 54. 



In the head, we find the mouth, the eyes, and fas feelers, 

 or antennae. 



