xviii. 



The Labides. 

 The Ductus ejaculatorius. 

 The Vesica. 

 The Cornuti. 

 II. THE FEMALE GENTTALIA. 



General Statement, 

 (vi) The Ovipositor. 

 The Ostium. 

 The Ductus Bursae. 

 The Bursa Copulatrix. 

 The Signum. 



