NO. 8 



INSECT ABDOMEN SNODGRASS 



III 



large subgenital plate. There is no eighth sternum, and the venter of 

 the eighth segment is represented only by the membrane of the anterior 

 wall of the vestibulum beneath the gonopore. The proctiger {Ptgr) 

 contains a dorsal and a ventral plate, and bears laterally a pair of 

 small appendicular processes (socii). 



The shaft of the ovipositor and the third valvulae project from 

 above the seventh sternum (fig. 36 B). The dorsal second valvulae 



Fig. 36.— Abdomen and ovipositor of Atanycolns rngosivcnlris (Braconidae). 

 A, abdomen, with ovipositor separated from the ensheathing third valvulae. 

 b', end of abdomen and base of ovipositor. 



C, distal part of shaft of ovipositor. . • 1 -j 



D, ventral view of base of united second valvulae, with ramus of right side 

 showing union with second valvifer. 



E, base of ovipositor and ninth tergum, showing articulation of first valvifer 

 at a' with ninth tergum, and at b with second valvula. 



are solidly united with each other in the free part of the ovipositor 

 (D, 2VI), and the tip of the resulting median dorsal piece of the 

 shaft is somewhat enlarged and slightly decurved (C). The first 

 valvulae slide freely on the ventral margins of the second valvulae, 

 and their distal ends (C) are strongly serrate on their lower edges. 

 The basal ramus of each first valvula (E, rivl) curves upward and pos- 

 teriorly to its attachment (c) with the dorsal margin of the corres- 



