PLATE 



EXPLANATION OF FIGURES 



39 Longitudinal section of an egg of Pseudococcus, showing only one blasto- 

 derm cell and several cleavage cells. 



40 Longitudinal section of an egg of Pseudococcus. 



41 A portion of figure 43, more enlarged. 



42 Transverse section of the egg of Pseudococcus at the time of the comple- 

 tion of the blastoderm. 



138 



