122 



F. C, WILLCOCKS — A MEALY BUG 



laboratory garden ; but altbough not difficult to find on the trees in this 

 neighbourhood, the mealy bug was present in small and scattered colonies 

 only. At this time, D, perniciosus was looked on as being an interesting 

 creature, but not of any great economic importance. Later in the year 



Fig. 1. — Healthy lebbek trees {Albizzia lehhek) growing on Gliezireli Island, Cairo.* 



(August 1907) it attracted considerable attention, owing to the fact that on 

 a few trees in Cairo it increased to such numbers and caused such serious 

 injury that the Tanzim decided to cut the invaded trees right back to the 

 trunk. They were treated in this manner with a view to preventing the 



* All the illustrations used in this article are from photographs taken by Mr. F. C. 

 Willcoclis. — Ed. 



