192 MOSQUITOES. 
teen days, no mosquitoes will breed in this water so im- 
portant upon prairie farms. Small bodies of water in pools, 
ditches and ponds should be treated in a similar manner, 
especially early in the season, when the surface is still free 

Fig. 156.—Mosquito, larva and eggs; also a single egg. Greatly enlarged. 
Original. 
from projecting plants. A few gallons, or even quarts, 
thrown upon the surface of the water when the wind is 
blowing fairly strong, will distribute the oil uniformly 
over the whole surface of the pond, and thus kill all the 
mosquitoes. Like most remedies against noxious insects 
this one should be used in time, or before the enemy has be- 
come very numerous. These ag- 
gressive insects can be kept away 
from houses,barns and cattle in the 
field by a smudge, or by strong- 
smelling substances, and in regions 
where they occur in vast numbers, 
such smudges are built in the even- 
Fig. 157.—Mosquito, pupa. 1088-0, Sportsmen, -anoineeetiees 
Pacman tia Mate 2s faces and hands with various 
compounds composed of mutton tallow and oil of penny- 
royal, or of oil of tar. The following mixture is excellent 
for this EDO Se 
Olive oil, 3 parts; oil of Sa a eer, 2 parts; glycerine, 1 
part; ammonia, 1 part. 
A wash with ammonia usually removes all bad effects of 
their bites, at least in most persons. The poison injected by 

