98 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



dorsal part of the pouch. Posteriorly the pouch has a large funnel- 

 shaped extension (d) that terminates in a narrow membranous neck, 

 which opens by a small pore (/) between the bases of the second val- 

 vulae of the ovipositor. From the base of the neck there arise later- 

 ally two small oval sacs (e) of a bright yellow color, into each of 

 which opens a long, slender, much-coiled tube. A large, median tubular 

 accessory gland (h) lies posterior to the pouch and opens at the rear 

 aperture of the latter (B, /) into the channel of the ovipositor. 



A section of the genital pouch (fig. 32 B) shows that the oviduct 

 opens into the pouch lumen at the tip of a long, conical inflection 



VlllStn 



VlllStn 



Fig. 32. — Genital chamber of Magicicada septendecim. 



A, lateral view of genital chamber pouch {GC) opening from vestibulum 

 {Vst) by copulatory aperture (a), but with posterior exit (/) for discharge 

 of eggs. 



B, diagrammatic median section of genital chamber, oviduct, spermatheca, 

 and vestibulum. 



a, copulatory opening to genital chamber ; h, entrance tube ; c, duct of sper- 

 matheca with opening (B, Spr) into genital chamber; d, posterior exit tube 

 for discharge of eggs ; e, reservoir of lateral accessory gland ; /, posterior open- 

 ing of &gg passage ; g, evagination of anterior wall of genital chamber with 

 gonopore (Gpr) at its extremity; h, median accessory gland. 



of the anterior wall of the pouch (g), which projects into the pos- 

 terior funnel-shaped passage (d) leading to the rear exit (/). Just 

 dorsal to the base of the oviducal cone is the opening of the sperma- 

 theca (Spr). The cuticular lining of the pouch is irregularly thick- 

 ened and corrugated, and is thrown into strong folds, the details of 

 which are not shown in the diagrammatic section (fig. 32 B). All 

 parts of the pouch and the entering oviduct are ensheathed in a thick 

 layer of muscle fibers (Mcls), which appear to be so arranged as to 

 force the oviducal cone into the posterior funnel (d). 



The presence of two genital openings in the female cicada suggests 

 the similar condition in Lepidoptera. Though the structure in the 



