97 



Plate Y. 



Fig. 49. Longitudinal section through the posterior 



half of the alimentary canal. x 550. 

 Fig. 50. Transverse section across the fourtli alidoniiiial 



segment. x 200. 

 Fig. 51. Transverse section across the posterior region 



of the prothorax. x 200. 

 Fig. 52. Transverse section across the head. x 200. 



The section is taken along the line a, h in 



fig. 27. 



Plate YI. 



Fig. 53. Diagrammatic figure showing the position of 



the ovaries (mature). x circa 10. 

 Fig. 54. Diagrammatic figure showing the position of 



the testes. x circa 15. 

 Fig. 55. Apex of ovary and base of terminal filament. 



X 400. 

 Fig. 56. Longitudinal section through the ovary 



showing developing eggs. x 180. 

 Fig. 57. Transverse section across the ovary through the 



germinal tissue. x 050. 

 Fig. 58. Apex of testis and base of terminal filament. 



x 400. 

 Fig. 59. Longitudinal section through the hinder third 



of the testis. x 400. 

 Fig. 59(7. Transverse section across the testis, passing 



through the germinal tissue. x 400. 

 Fiff. GO. Longitudinal section of a tergo-sternal muscle 



at its point of insertion. x 400. 

 Fig. Gl. Portion of musculature of mid-gut, showing 



junction of the circular fibres in the median 



dorsal line. x 400. 

 Fig. G2. Ditto of hind-gut. x 550. 



