PLATE 18 



EXPLANATION OF FIGURES 



118 Median longitudinal section of a Pseudococcus embryo a short time before 

 the completion of the alimentary canal. 



119 Longitudinal section of the embryo of Pseudococcus at the time of the 

 completion of the alimentary canal. 



120 Longitudinal section of an Iceryan embryo. 



121 Transverse section of an Iceryan embryo like the one represented in 

 figure 119. 



162 



