PLATE VI 



Fig. ii. Transverse section through the posterior part of the head of 

 a wingless adult female. 



Fig. 12. Transverse section through the posterior part of the first 

 thoracic ganglion. 



Fig. 13. Transverse section through the fourth abdominal somite of a 

 vrir.ared acul: fevr.ale. 



See page 113 for reference letters. 



