90 
CHRYSANTHEMUMS. 
is a first-rate plan. The solution should be prepared as 
follows : Place a piece of bath brick in a wooden pail and pour 
as much paraffin oil thereon as it will soak up. Fill the pail 
with water, and leave it for three or four days, then remove 
the scum from the surface, and syringe, or, better still, spray 
Leaf-Mining Maggot. 
Much damage is often done to the leaves of the chrysanthemum and the margruerite 
by the magrgrots of a small fly scientifically known as Phytomyza affinis. The fly (a) 
makes an incision in the leaf(c) and deposits an egg therein, which eventually hatches 
into a small magrgrot (&) that feeds on the solt tissues and causes blisters to form 
thereon. 
the foliage thoroughly with it in the evening. Prepared thus# 
the essence of the oil is thoroughly communicated to the 
water, and no injury will be done to the foliage. The oiled 
surface acts as a deterrent to the fly depositing its eggs. 
