EXTERNAL PARASITES 43 



The whitewash should contain in it, some para- 

 siticide as carbolic acid five per cent, creolin five 

 per cent or corrosive sublimate one part in one 

 thousand. The roosts should be scrubbed with 

 boiling water and after drying in the sun should 

 be saturated with kerosene. The litter and straw 

 should be removed from the nests and burned and 

 one inch of air-slacked lime placed in the bottom 

 of the nests before refilling them with straw. If 

 the henhouse be tightly closed, doors, windows, 

 cracks and all openings, and thoroughly fumi- 

 gated with sulphur fumes and water vapor it will 

 aid in destroying lice or other parasites that may 

 be in the cracks and crevices, and difficult to 

 reach with whitewash. Fig. 9 illustrates a cheap 

 and convenient spray pump for applying the 

 whitewash. With this some force is used which 

 drives the parasite-destroying fluid into the 

 cracks and crevices not possible to reach where 

 it is applied with a brush. 



Scabies 



The acarids, or mites, as they are commonly 

 called, are exceedingly common, widely dis- 

 tributed and of great economic importance. 

 They are eight-legged parasites, belong to the 

 spider family and are so small as to be nearly or 

 quite invisible to the unaided eye, though readily 

 discernible with the aid of a hand lens of low 

 magnifying power. 



There are numerous species of mites that in- 

 fest birds. Some live on the feathers and scales 

 of the skin, others bore into the skin and still 

 others inhabit deeper portions of the body. 



There is one form of scabies called depluming 

 scabies that is very rare, and so far as the author 



