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 



