84 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I37 



VII. THE OVIPOSITOR AND RELATED STRUCTURES 



The terminal part of the female abdomen in the family Pauliniidae 

 is very unusual, and the ovipositor differs considerably in several de- 

 tails from the usual acridoid ovipositor. The external aspect of this 

 terminal part of the female abdomen has been described by Uvarov 

 (1929) and Rosas-Costa (1940) for the species remipes and by Wil- 

 lemse (1948) for M. clearei. 



The end of the female abdomen in Marellia remipes (figs. 16, 17 A) 

 is characterized by an extraordinarily enlarged eighth sternum 



VIIIT- 



-End of abdomen of Marellia remipes, female. 



A, ventral view. B, dorsal view. 



Ccr, cercus ; Eppt, epiproct ; Ppt, paraproct ; VIIS, seventh abdominal sternum ; 

 VIIIS, eighth abdominal sternum, or subgenital plate of the female; VIIT, 

 VIIIT, seventh and eighth abdominal terga; iVV, basal lobe of the first valvula 

 of ovipositor ; 3VI, third valvulae of ovipositor. 



(VIIIS) which constitutes a curiously shaped subgenital plate. This 

 subgenital plate extends considerably beyond the tip of the ovipositor, 

 which is practically lodged in a cavity on its dorsal surface and in 

 such a way that only the tips of the first and third valvulae emerge 

 from it. The present study has been made on alcohol-preserved 

 specimens, but in the dried ones the ovipositor is often still more re- 

 tracted, so that in a lateral view of the abdomen not even the tips of 

 its valvulae show. The female subgenital plate can be properly called 

 troughlike, as does Uvarov in his description of the genus (1929). 

 The apex of this subgenital plate is flattened, decurved, and has a tri- 



