EXPLANATION OF PLATE III. 



Metamorphoses of Pieris brassicce. 



Fig. i. — Ova in situ (magnified x 10). 



Fig. 2. — Young larvae in situ on Nasturtium leaf (natural size). 



Fig. 3. — Full-fed larva suspended for pupation. 



Figs. 4, 5, 6 and 7. — Successive stages in the development of the pupa. 



Fig. 8. — Fully-formed pupa. 



Fig. 9. — Imago in situ during the development of its wings. 



See p. Si. 



