THE LOCUST OR SHORT-HORNED GRASSHOPPER 369 



losophy," to which insects respond by virtue of appropriate 

 sense-organs. 



Reproduction and Life Cycle. — The structure of the repro- 

 ductive organs has been described, and mention has been made of 

 the breeding habits in the paragraphs on general activities. The 

 spermatozoa of the male locust are transferred to the female by 



Fig. 189. — Young locusts feeding on clover. 



(From Farmers' Bulletin No. 748, U. S. Dept. Agr.) 



sexual union and stored in the seminal receptacle (Fig. 180 A). 

 As the eggs he in the vagina, preparatory to laying, the spermatozoa 

 enter the minute opening at one end of the egg membrane, and the 

 sperm nucleus unites with the egg nucleus in fertihzation. In egg 

 laying, the ovipositor of the female is thrust deeply into the ground 

 (Fig. 186) and expanded to form a ca\'ity in which are laid the 

 masses of eggs, fastened together by a sticky secretion. With the 

 withdrawal of the ovipositor and the collapse of the edges of the 

 excavation, this egg mass is left just below the surface. When 

 the young grasshoppers hatch in the spring they are thus near the 



