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HANDBOOK OF INVERTEBRATE ZOOLOGY. 



(iii.) Running backwards from the posterior margin of 

 the tenth terguin is the flat cereus (Fig. 135, d). 



(iv.) Above this a portion of the eleventh tergum (Fig. 

 135, 11} is visible. 



(v.) Below and internal to the cereus is the podical 

 plate (Fig. 135, 6), triangular in a side view : and below 

 this the large sub-genital plate (Fig. 135, ), which is 

 joined to the ninth sternum. 

 10. The abdomen of the female, 

 a. In a ventral or side view (Fig. 137), notice : 

 (i.) The first to the seventh sterna, like those of the 

 male. 



(ii.) The eighth sternum (Fig. 137, 

 8*) is nearly twice as long as the 

 seventh, and forms the sub-genital 

 plate. Its posterior end is pointed, 

 curved upwards, and its extremity 

 (Figs. 139, 11*) lies between the 

 plates of the ovipositor. 



FIG. 136. Dorsal view of end of abdomen 

 of female Acridium Americanum. (Drawn 

 from nature by W. K. Brooks.) 



Explanation of letters and figures for Figs. 

 134 and 136: 



7, 8, 9, 10, 11. Terga of the seventh to 

 eleventh abdominal somites. a. Male sub- 

 genital plate, b. Podical plates, c. Free end 

 of eleventh tergum. d. Cerci. e. Suture. 

 g. Dorsal plates of ovipositor. 7i. Ventral 

 plates of ovipositor, t. Central plates of ovi- 

 positor, or "egg-guides." 



FIG. 136. 



b. In a dorsal view (Fig. 136), notice : 

 (i.) The first ten segments, substantially like those of 

 the male. 



