THE PARTS OF A LOCUST. 



II 



FIG. i. A locust. 



LESSON I. 



THE PARTS OF A LOCUST. 



Collection of Specimens and a General View of the Body. 



1. Collect several locusts or short-horned grass- 

 hoppers and bring them to the school. They can be 

 carried in a small box 



or wide-mouthed bottle. 

 Fig. i represents one of 

 these insects. 



2. If living locusts 

 are collected, kill them 



by leaving them in a cyanide bottle for a half hour 

 or more. 



NOTE. If the pupils can not find living locusts at the time this 

 lesson is taken, preserved specimens will be furnished by the teacher. 



3. Count the legs and the wings of the locusts, 

 and make a note of the number of each on a sheet of 

 paper headed Notes on the Parts of a Locust. 



4. Study the body of the insect and observe that 

 it is composed of three portions : first, the head ; sec- 

 ond, a stout portion to which the 



/ legs and wings are attached, the 



FIG. 2. "\Vasp, with head, tho- 

 rax, and abdomen separated. 



FIG. 3. Side view of locust with wings 

 removed. 



thorax ; and, third, the hinder part of the body or 

 abdomen (ab-do 1 men}. 



In a locust the division between the thorax and 



