The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1909-01-24

BY J. r. PAUL,
The boards OF health throughout the
entire country are doing precisely what
the local health authorities are seek
ing to do in this state-to arouse the
people TO a sense of the dangers they
incur, through the diseases they invite,
from federation of the presence of the
common fly. Musca domestica, in their
| living rooms or. in fact, anywhere
about their premises.
War on the House Fly.
DIT. Stewart urges that war of ex-
termination be waged against the
house fly. The reason Is that the fly
does not clean its feet Wherever It
goes il scatters numerous germs (bac-
teria), some of which may spread dis
ease. This danger is much greater
than the public has thus far been able
to realize. Typhoid fever and other
diseases of the intestinal tract are most
usually carried to our food on the feet
of the fly. The best remedy is to screen
out the flies from the houses and TO
prevent the breeding of thousands by
covering of earth or to destroy the lar
vac by a little chloride of lime sprin-
| Killed. over the breeding places. Flies
that frequent places where filth and
refuse are deposited are literally loaded
with the germs of nameless plaques
The pictures show the house fly and
several nearly like IL magnifed TO snow
structural details.
Five Of the RsseaIs.
Fig. 1 is the stable hy-the one that
/ bites or rather stings, with its mouth
| parts. The house fly Gig. p does not
bite. nor does the second stable ny.
shown Just below il Gig. 81 Both of
those to the left strongly resemble the
house fly In general appearance, and
therefore most people firmly believe
that the house fly occasionally bites.
/ Another, somewhat larger than the
house fly aud less active, has darker
| abdomen, with a sprinkling of yellow
/ ish hairs. There is smaller house
fy with translucent patches al
| the base OF the abdomen. which is mis-
taken for a young house fly and has led
| TO the erroneous belief that flies grow
| after gaining wings. Fig. is one OF
| the large green blow flies
The Worst Immigrant.
4 small fruit fly appears also in
autumn. and still another one, more
slender. on the window panes. And yet
out Of 23.os7 flies collected by Howard
in dining rooms in different parts OF
the country, 22.s0s, OF 9s.s per cent,
were house flies. The Musca domestIca
Is very dangerous to the health OF hu-
man beings in carrying the germs OF
tvphoid fever and cholera to food sup
niles. II is an immigrant from Europe,
and was probably brought over by the
first colonists. This is the immigrant
that has done more harm in America
than perhaps oil other importations-
human. animal or vegetable.
There Are Many Kinds.
| Flies are of 50 many species that they
have never yet been catalogueo- Inc
number of known species up to 1863
was estimated at e0sS00. ana several
! hundred species per year are peihg
added to the list All true flies nave
/ two wings, membraneus, held horizon
/ tai and attached to the middle part OF
the thorax. transparent and not capable
/ Of being folded; the second PAIR oil
/ wings, attached in the case OF Iour-
winged insects to the rear poruon OF
/ the thorax, are represented in the flies
/ by q pair of small knobs called naIteres
| or hslancers; these become slender rods
| i'm the crane flies. Flies have prooos-
cis-an extensible lower lip, resembling
| a tongue-for sucking up their food
This organ varies in structure in the
| different species. 1t is usually folded
I'D under the head, but when in use ii
/ is thrust out and opens fr-o two rough,
rasping lobes, used 10 scrage- of bits of
meat, bread, etc, and to i@r up liquids.
| Horse flies and deer flies have mouth
parts adapted TO both piercing and
| sucking.
Structure and History
/ 49, f,-~c brod q .-arx, aa-yfhIo