PLATE 19 



EXPLANATION OF FIGURES 



122 Transverse section of Iceryan embryo like the one represented in 

 figure 119. 



123 and 124 Hair glands of a newly hatched Pseudococcus larva. 



125 Transverse section through the eyes of an embryo like the one represented 

 in figure 119. 



126 Caudal portion of an embryo Pseudococcus like the one represented in 

 figure 70. 



127 and 128 Stages of the growth of the rudiments of the midgut of 

 Pseudococcus. 



164 



