page_0018

suck sap from plants.

The house fly deposits its eggs in
mannure heaps and other filth;
for this reason cities pass ordinances
compelling the keepers of horses and
cows to provide themselves iwth
covered reseptiles into which to throw
mannure; nothing can be more
disgusting than to see the house fly
leave such mannure heaps and
come to eat with us at the table.
The young flys are white grubs
which live on liquid filth, they ahve
no mouth, but absorb this liquid
filth thru the skin, they are known
as magets and are valuable as
scavengers. The adults horse-fly
has a rasp like tongue with which
it files a particle of food, mixes it
with saliva thus putting it into
solution and then lapping it up.