80 INJURIOUS INSECTS OF 1909 AND IQIO. 
Some Natural Enemies of the House Fly. 
It addition to some insects which attack the Typhoid fly, such 
as the Dragon Flies, and the Robber Flies, which may make some 
inroads on their ranks, we find a tiny mite attacking them, as shown 
in Fig. 32, and in the autumn a very common fungous disease, the 
spores of which find suitable nourishment in their bodies. Flies 
killed by this desease, as shown in Fig. 31, are often seen hanging 
on window panes with this vegetable growth around them. 
REMEDIES. Screens on windows and doors, sticky fly paper 
(preferable to poisoned fly-paper), the doing away with manure- 
heaps, the covering of slops and of filth, not leaving them to pollute 
the neighborhood of the house. Swill barrels should have tight 
covers. Some farmer’s wives put sticky fly paper on the outside of 
their screen doors at the top and this catches the flies which gather 
on the doors. Intestinal discharges from a patient suffering from 
Fie. 31. Fly killed by a fun- Fig. 32. Fly attacked by 
gous growth. mites. Lugger. 
typhoid or any other fever, or any infectious disease, should be steri- 
lized before being emptied into sewer or cesspool. Stables should 
be, where possible, located at a distance from the house. A reason 
for not letting horse manure accumulate is very evident, and some 
stables are so constructed that this is kept in a covered compartment 
until removed, or treated frequently with a substance which will kill 
the maggots of the house fly. The following poison we have found 
to be good and at the same time sterilizes the fly; two teaspoonfuls 
of formaldehyde in a pint of water placed in shallow dishes. Do 
not buy groceries or meats from any store where flies are tolerated. 
Fruits and candies should be screened from flies; keep them away 
from the baby or its milk bottle. Another remedy is that of fumi- 
