PLATE 1 



EXPLANATION OF FIGURES 



Pseudococcus 



1 Ovary of larva at the time of hatching. 



2 A portion of sagittal section of the ovary of a larva in early fourth instar. 



3 As above. Much later stage. 



4 to 15 Stages in differentiation of the three ovarian cellular elements, 

 namely, the nurse cells, egg cell, and follicular epithelial cells. 



128 



