
AMERICAN MUSEUM GUIDE LEAFLETS 

shown that the maggot trap will destroy 99 per cent. of the maggots 
developing in manure. After the manure has been standing on 
the maggot trap for 10 days it will be practically free from magéots 
and may be used on fields or gardens or stored in heaps without 
likelihood of any further breeding taking place init. The advantages 
of the maggot trap are that it is cheap, requires little extra labor to 
operate and to dispose of the drowned maggots, and it does not lessen 
the value of the manure but rather tends to preserve it. As is the 
case with all other methods, the use of the maggot trap must be sup- 
plemented by careful attention to possible breeding places other than 
horse manure.” 
2. Destruction of Adult Flies 
Simple and effective flytraps may be used to some advantage in 
decreasing the number of flies. Their use has been advocated not 
only because of their immediate results, but because of the chance 
that the flies may be caught before they lay their first batch of eggs, 
and that thus the possible number of future generations will be 
materially reduced. | 
Many types of flytraps are on the market, and asa rule the larger 
ones are the more effective. Anyone with a few tools, however, can 
construct flytraps for a small part of the price of the ready-made ones. 
A trap which is very effective in catching flies, and is easily made, 
durable, and cheap, may be constructed as follows: 
“The trap consists essentially of a screen cylinder with a frame 
made of barrel hoops, in the bottom of which is inserted a screen 
cone. The height of the cylinder is 24 inches, the diameter 18 inches, 
and the cone is 22 inches high and 18 inches in diameter at the base. 
Material necessary for this trap consists of four new or second- 
hand barrel hoops; one barrel head; four laths; 10 feet of strips 1 to 
1% inches wide by ™% inch thick (portions of old boxes will suffice); 
61 linear inches of 12- or 14-mesh galvanized screening 24 inches 
wide for the sides of the trap, and 41 inches of screening 26 inches 
wide for the cone and door; an ounce of carpet tacks, and two turn 
buttons, which may be made of wood.’ The cost of the material for 
this trap is not great, and in many cases the barrel hoops, barrel head, 
laths and strips can be obtained without expense. 
“In constructing the trap, two of the hoops are bent in a circle 
(18 inches in diameter on the inside) and nailed together, the ends 
being trimmed to give a close fit. These form the bottom of the frame 
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