2 FARMERS’ BULLETIN 1734. 
Fly trapping should begin early in spring if it is to be of greatest 
value. Although comparatively few flies are caught in the early 
spring, their destruction means the prevention of the development 
of myriads of flies by midsummer. 
\ 
KINDS OF FLIES CAUGHT. 
The various species of flies which are commonly annoying about 
habitations or where foodstuffs are being prepared may be divided 
roughly into two 
classes: (1) Those 
which breed in animal 
matter, consisting 
mainly of the so-called 
“Dblowflies”; and (2) 
those which breed in 
vegetable as well as in 
animal matter. In the 
latter group the house 
fly is by far the most 
important. The stable 
fly is strictly a vege- 
table breeder, as are 
also certain other spe- 
cies which occasionally 
come into houses and 
may in rare cases con- 
taminate foodstuffs. 
The stable fiy, which 
breeds in manure or 
decaying vegetable 
ENN 
BN) 
N 
N 
N 
ANY 
Fic. 1.—Conical hoop flytrap; side view. A, Hoops form- matter, and the horn 
ing frame at bottom. B, Tloops forming frame at top. iy which breeds in 
C, Top of trap made of barrel head. D, Strips around ee 
door. H, Door frame. F, Screen on door. G, Buttons COW manure, are blood- 
holding door. J7, Screen on outside ofatrap?, J; Strips on sucking spec 1 es, and 
side of trap between hoops. J, Tips of these strips pro- yee i Z 
jecting to form legs. K, Cone. L, United edges of screen Call be caught in ordi- 
forming cone. MV, Aperture at apex of cone: (Author's nary flyt ‘aps in com- 
illustration.) ‘ 
paratively small num- 
bers only. The kind of flies caught depends to a considerable extent 
on the material used for bait. In general the house fly and other 
species which breed in vegetable matter are attracted to vegetable 
substances, while the blowflies will -come most readily to animal 
matter. This rule, of course, is not absolute, as flies are less restricted 
in feeding than in breeding habits, and, as is well known, the house 
fly is attracted to a greater or less extent to any moist material, 
especially if it has an odor. 
