HARD PARTS OF THE GRASSHOPPER. 



255 



(ii.) The shield-shaped eleventh tergum (Figs. 136, 11) 

 is shorter and wider than in the male. 



(iii.) On each side of it, at a little lower level, is the 

 triangular podical plate (Fig. 136, b), which is not ver- 

 tical, as in the male, but is so placed that its broad sur- 

 face is seen in a dorsal view. 



(iv) . Above, or dorsal to the podical plates, are the cerci 

 (Fig. 136, df), much smaller than in the male, but attached 

 to the posterior margin of the tenth tergum. 



(v.) As in the male, the anus is between the podical 

 plates, just below the eleventh tergum. 



Fig. 137. 



Fig. 137. — Side view of tip of female abdomen of Acridium Ameri- 

 canum. (Drawn from natm-e by W. K. Brooks. ) 



Explanation of letters and figures for Figs. 1.S5 and 137. 



7, 8, 9, 10, 11. Terga. 7* 8*, 9*. Sterna, h, h\ Podical plates, c. Tip 

 of eleventh tergum. d. Cerci. a. Sub-genital plate, g. Dorsal division 

 of ovipositor, h. Ventral division of ovipositor, i. Median division of 

 ovipositor, or " egg-guide." x. Spiracles, y. Reproductive aperture. 



(vi.) The space between the podical plates above and 

 the sub-genital plate below is filled by the ovipositor, the 

 tip of which (Fig. 136, g, li) projects some distance be- 

 yond the eleventh tergum. 



c. In a side view (Fig. 137), the terga are substantially 



