SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 89 



a large, slitlike opening (a) between the ventral, or outer, rami of the 

 second valvulae (rivlo) , which leads into a small cavity into which 

 the oviduct appears to open, but the internal anatomy could not be 

 satisfactorily studied in the dried specimens on which this descrip- 

 tion is based. As will be shown later a similar but much larger pouch 

 in Magicicada is the genital chamber, receiving the openings both of the 



Ovipositor of Amblydisca gigas (Cicadellidae). 



A, genital segments and ovipositor. 



B, seventh segment removed, showing first valvifer in pleural position on 

 side of eighth segment, and exposing rudimentary eighth sternum. 



C, base of right first valvula, mesal view, showing connection of inner ramus 

 (rivli) with ninth tergum. 



. D, right second valvifer and basal parts of second and third valvulae, mesal 

 view, showing articulation (/>) of second valvifer with ninth tergum, and tergal 

 muscles (6, 7) of valvifer. 



median oviduct and the spermatheca (fig. 32, GC). In Magicicada, 

 however, there is a second, posterior opening from the genital cham- 

 ber between the bases of the second valvulae. A posterior opening 

 could not be found in Amblydisca, and it has not been observed 

 in any homopteron except two species of cicadas. The structure in 

 Amblydisca, therefore, so far as can be judged from dried specimens, 

 is the same as that described for Homoptera generally by other 

 writers. (See Holmgren, 1899; Myers, 1928; Weber, 1930.) 



