ARTHROPODA 



203 



abdomen which assists in placing the eggs in position as they 

 are laid ; this is called the ovipositor and differs in form in the 

 different groups. 



16 



14 



B 



FIG. 199. Periplaneta orientalis, male cockroach; enlarged two diameters. A. 1. antenna; 

 2, palp of first maxilla; 3, prothorax; 4, anterior wings; 5, femur of second leg ; 6, tibia; 

 7, tarsus; 8, anal cerci ; 9, styles. B. I, antenna; 2, head; 3, prothorax; 4. anterior 

 wins;; 5, soft skin between terga and sterna ; 6, sixth abdominal tergum; 7, split portion 

 of tenth abdominal tergum; 8, anal cerci; 9, styles; 10, coxa of third leg; n, trochanter; 

 12, femur; 13, tibia; 14, tarsus; 15, claws. (From Shipley and MacBride's Zoology.) 



