— 27 — 



Caudad of the tenth tergum there is on the dorsimeson a 

 shield-shaped piece ; this is believed to represent an eleventh 

 segment. It consists of two sclerites ; as is indicated by a 

 transverse suture. 



On each side, projecting from beneath the caudal border 

 of the tenth tergum, is a pointed appendage ; these are the 

 cerci. 



Entad of each cercus there is a much larger, triangular 

 sclerite which extends from the lateral border of the tenth 

 tergum to the caudal apex of the eleventh tergum ; these 

 are termed by Brooks* the podical plates ; by Packardf the 

 uropatagium. 



By lifting the free end of the eleventh segment, the caudal 

 opening of the alimentary canal, the anus, is exposed ; it is 

 situated between the podical plates. 



Caudad of the podical plate is the dorsal pair of pieces of 

 the ovipositor. 



Make drawings of the dorsal and the lateral aspects of this 

 part of the body. 



Caudal Part of the Abdomen of the Male. — In the 

 male ten abdominal sterna are present ; the tenth is a hood- 

 shaped sclerite on the caudal aspect of the body. 



As in the female, the ninth and tenth abdominal terga are 

 united on their lateral margins. 



Projecting from the caudal margin of the tenth tergum 

 there is on the dorsimeson a forked appendage, the furcula. 



The eleventh tergum is furrowed by three deep longi- 

 tudinal grooves. 



The cerci are situated as in the female, but are longer. 



The podical plates are nearly as in the female. 



Make drawings of the dorsal and the lateral aspects of this 

 part of the body. 



*Handbook of Invertebrate Zoology, p. 253. 

 •(•Zoology, Advanced course, p. 309. 



