m 3VI 



iW aiv 2Vir 10 iVl 



Fig. 17. — Details of structure and musculature of ovipositor of Gryllus 

 assimilis. 



A, base of ovipositor, showing articulation of first valvifer (iVlf) at a with 

 ninth tergum, and at h with second valvifer. 



B, C, D, apical structure of shaft ovipositor. 



E, inner view of genital and tenth segments, with right half of base of oviposi- 

 tor and muscles of same side. 



F, inner view of right first valvifer, showing its articulation (a) with ninth 

 tergum, its anterior muscles, and connection (c) with first valvula. 



G, inner view of right second valvifer and its muscles (6, 7), together with 

 anterior intervalvula {aiz'), rudimentary second valvula {2VI), and base of 

 third valvula (sl'l). 



H, dorsal view of valvifers and intervalvulae, and their muscles ; first valvifers 

 (iVlf) articulated dorsally (a) to ninth tergum (/AT), posteriorly (dh) to 

 second valvifers {^I'lf) ; second valvifers connected anteriorly by anterior inter- 

 valvula (aiv) and posteriorly by posterior intervalvula (piv). 



58 



