WAYS AND MEANS OF LIVING 



male (B, Tes) in which the spermatozoa reach their com- 

 plete growth. Appropriate ducts connect the ovaries or 

 the testes with the exterior near the rear end of the body. 

 The female usually has a sac connected with the egg duct 

 (A, Spm) in which the sperm, received at mating, are 

 stored until the eggs are ready to be laid, when they are 



VHI IX X Cer 



i / / / 



Fig. 74. The ovipositor of a long-horned grasshopper, a member of the katydid 

 family, showing the typical structure of the egg-laying organ of female insects 



A, the ovipositor (Ovp) in natural condition, projecting from near the posterior 



end of the body 



B, the parts of the ovipositor separated, showing the six component pieces, 

 two arising from the eighth abdominal segment {VIII), and four from the ninth 

 (IX). An, anus; Cer, cerci; IX, ninth abdominal segment; Ovp, ovipositor; VgO, 

 vaginal opening; VIII, eighth abdominal segment; X, tenth abdominal segment 



extruded upon the latter and bring about fertilization. 

 The egg cells ordinarily are all alike, but the spermatozoa 

 are of two kinds; and according to the kind of sperm re- 

 ceived by any particular egg, the future individual will be 

 male or female. 



[ 123] 



