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F. C. WILLCOCKS — A MEALY BUG 



The protection afforded to the insects by the covering of dead leaves, etc., 

 is very considerable ; and it is almost impossible to reuch the underlying- 

 insects with insecticides when protected in this way. 



In the earlier stages of the attack, the effect which is produced on the 



Fig. 6. — Lebbek tree in Cliareli Kasr el Nil, attacked by Dactylophis. 

 The entire crown of this tree has been killed. 



foliage by the irritation set up from the numerous punctures made by the 

 sucking tubes of the insects, is quite marked. The growing points of 

 the twigs and the young leaves become twisted and malformed. The leaves, 

 moreover, do not grow out normally but remain in a rather closely packed 

 mass. In the case of one tree, this effect was particularly noticeable ; the 



