TIIE CONTROL OF FLIES IN THE EGYPTIAN CAMPAIGN. 



307 



parts of the tents to spend the night and will invariably select the wires to settle on. 

 Often the wires are thickly covered with flies after hanging for an hour or so, and 

 counts made showed that 200-250 were caught on an average on each wire. 



The fly-wires are afterwards burnt clean and re-coated with tanglefoot. They 

 were made in hundreds and issued to units who returned them to be re-coated. 



Fly-papers were also issued by the A.S.C., but they are not nearly so efficient as 

 tanglefoot wires. 



(3). Fly-traps. — Several kinds of fly- traps are in use in the different camps. 

 Successful baiting and the selection of a position for the trap where the flies are not 

 disturbed are two important points. It is a good plan to change the variety of the 

 bait and the position of the trap from time to time. A mixture of vinegar, bread 

 and sugar is an excellent bait. 



The following type of fly-cage (fig. 6) which I had made, being based on the 

 American pattern of balloon fly-trap, gave excellent results. 



Fig. 6. Fly cage made with wire gauze on a wooden framework : 

 o, opening on floor of cage ; s, narrow opening leading into the 

 cage between the two inclined pieces of wire gauze ; t, wooden 



tray ; 6, bait. 



It consists of a box with wooden frame- work forming a cubical cage of 18 inches a 

 side. The sides are of wire gauze, and the top is covered with mosquito netting. The 

 bottom is made of light wood, the central portion (6), 5 inches wide, being left open, 

 forming an opening 18 inches X 5 inches. Along the sides of this opening two pieces 

 of wire gauze (18 inches X 7 inches) are fixed, inclined inwards and approximating, 

 but just leaving sufficient space (s) for flies to get through into the cage. 



The cage, standing on legs one inch high, is placed on a wooden tray (t). The 

 part of the tray immediately below the opening (o) is painted black, and the bait is 

 placed on this in the position (b). The flies, attracted by the bait, get into the angle 

 between the two inclined pieces of wire gauze and make their way upwards towards 



