Aonidia. yi 



appear in the form of dark bands curving round each side of the head (Jl_i(. 24). 

 These represent both the upper and lower pairs, which in this early stage are 

 seen to be connected. The pupa is rather broad and depressed, the limbs 

 folded along the sides of the body, and all the segmental divisions clearly 

 indicated (y??-. 35). 



Habitat on the upper surface of leaves of Psychotria Ihwaitesii and Litzea 

 zeylanica, I'unduloya (September, October). The insects are usually ranged 

 along the sides of the midrib and principal veins. 



This interesting species is readily distinguished by the remarkable radiating 

 horns of the young scale, a character which has suggested its specific name. 



The female insect is attacked by a minute hymenopterous parasite, which 

 has been described by Professor L. O. Howard under the name of Encarsia 

 aonidia. 



EXPLANATION OF PLATES XVII. AND XVI lA. 



Aonidia corniger, 



{All figures., except No. i, more or less enlarged.) 



Eig. I. Part of leaf, with insects in situ, nat. size. 



2. Young scale, dorsal view (tufted stage), 



3. „ female of second stage, dorsal view. 



4. „ scale (horned stage). 



5. „ ,, „ „ from below. 



6. „ „ (intermediate stage), side view. 



7. Female puparium, dorsal view. 



8. „ „ with larval horns persisting. 



9. „ „ from below, showing adult female in situ. 



(The ventral half of the scale has been dissected off.; 



10. Adult female, dorsal view. 



11. „ „ antenna. 



12. „ ,, ventral view. 



13. Young larva, ventral view. 



14. Head of adult male, from below. 



1 5. Male puparium, from below. 



16. Adult male, dorsal view. 



17. „ „ side view. 



18. „ „ terminal joint of antenna. 



19. Second pellicle of female, ventral view. 



20. First pellicle ; diagram of dorsum. 

 21, 22, 23. Pygidium of adult female. 



24. Male larva, shortly before pupating, ventral view. 



25. „ pupa, dorsal view. 



