5 o REPORT ON INJURIOUS INSECTS FOR 1904. 



preferring damp land. Sand, saturated with paraffin scattered 

 along hedgerows, etc., will act as a deterrent to egg laying. As 

 remedial measures, harrowing and rolling kills the larvae and 

 exposes them to the attack of birds. Rooks and starlings are espe- 

 cially fond of them ; top-dressing with forcing manures. 



FIG. XXV. THE COMMON CRANE FLY (Tlpula oleracea). 



i. Adult male. 2. Adult female. 3. Eggs. 4. Larva. 5. Pupa. 

 (All natural size, except the eggs, which are slightly magnified.) 



Pachyrhina maculosa, Meigen. 



The larvae, and later the adult flies of this species, the Spotted 

 Crane Fly, were collected by a correspondent, in his garden, who 

 complained of the damage done to his lawn and various kinds of 

 garden plants, at the roots of which he found the larvae at the end 

 of May. 



LARVAE OF HOVERING FLIES. 



Syrphidae. 



Many inquiries have been made and specimens received of the 

 leech-like larvae of different species of Hovering Flies. Very 

 numerous were the specimens of Catabomba pyrastri, Linn., found 

 feeding on the Elm Gall Aphis, and Elm Leaf Aphis, they have 

 also been sent in on Apple leaves infected with the Apple Aphis. 

 Still more numerous have been the specimens of Platychirus scuta- 

 tits (Meig.), on Roses infected with the Rose Aphis. 



