44 PARASITOLOGY. 
Lice may be found at all seasons of the year, but 
are more common in the hotter months of July and 
August. In these months, conditions are more favor- 
able to their propagation. 
Treatment of Infested Birds and Eradication of 
Lice—The chickens should be dusted with insect 
powder (pyrethrum) or pyrethrum and sulphur equal 
parts, or a combination of these with tobacco dust, 
which can be secured from a tobacco factory. This 
powder can best be dusted among the feathers by aid 
of a powder gun, which can be secured at a drug 
store. It can also be placed in the dusting places. In 
ridding the birds of lice, it will be well to keep in 
mind that frequent dusting with powder will be neces- 
sary, as the eggs or nits are not all likely to be killed 
by the powder. Another means of ridding chickens 
of lice is to dip them in five per cent solution of 
Creolin, Kreso dip, or the same per cent of Zenoleum. 
After the flock has been freed from lice, care 
should be exercised that a reinfestation is not brought 
about by the introduction of lousy birds. The hen- 
house in which lousy birds are located should be 
thoroughly and frequently cleaned and the walls 
whitewashed. The whitewash should contain in it 
some parasiticide as carbolic acid five per cent, creolin 
five per cent, or corrosive sublimate one part to a 
thousand. The roosts should be scrubbed with boil- 
ing water, and after drying in the sun, should be 
saturated with kerosene. If the hen house be tightly 
closed and thoroughly fumigated with sulphur, it will 
aid in destroying lice or other parasites that may be 
in the cracks and crevices and difficult to reach with 
