PLATE XI.— THE PSILLA. 



Fig. 1. An olive twig full of blossoms, a, a, shows the cottony 

 material deposited by the Psilla enclosed therein. 



Fig. 2. The egg (enlarged.) 



Fig, 3. The larva (enlarged.) 



Fig. 4. The chrysalis (enlarged.) 



Fig. 5. The insect, seen from above (enlarged.') 



Fig. 6. The insect, side view (enlarged.) 



Fig. 7. The head, front view (enlarged.) 



Fig. 8. The antenna (enlarged.) 



