176 Transactions. — Zoology. 



of the present paper ; Ast. lecanioid-es appears to have been 

 made up of both Aleurodes papilli/er and A. simplex.} 



INDEX TO PLATE XIII. 

 Fig. 1. AUurodcs sacchari, adult female. 



Fig. 25. A. fagi, pupa, dorsal view. 

 Fig. 26. „ „ side view. 



'6- 



Pig. 27. A. simplex, pupa. 



AitT. XIX. — TJie Wattle-blight (Icerya purchasi) in Tas- 

 iiiaina, and its Natural Enemies. 



By Jas. Hudson, M.B. 



Head before Die Nelson. Philosophical Society, 4th Ajtril, IS/S'J. 



The ravages of this bhght on our acacias and wattle-trees 

 are \Yell known. It seems to have a special liking for plants 

 of the natural order LeguviinoscB (gorse and broom, d-c), but 

 it also attacks, and that most disastrously, orange- and lemon- 

 trees. I know many instances of lemon-trees in Auckland and 

 Nelson which formerly bore splendidly, but which now, owing 

 to this blight, give their owners scarcely any fruit. You may 

 frequently find it also in rose-bushes, and it is said to affect 

 pines, cypresses, and grass. The insect, like most of the 

 Coccidida, is at first active ; soon, however, it bores through 

 the bark of some twig, which it selects, with its proboscis, and 



