228 



Diseases of Poultry 



often leads to epileptiform symptoms and death follows in a 

 few days. 



Theobald suggests dusting flowers of sulphur among the 

 feathers when the parasites are present. Probably the 

 Lawry lice powder (p. 211) would be more effective. When 



Fig. 49. — The poultry tick, Argas persicus. Adult ventral view, showing 

 the four pairs of legs, mouth parts, etc. (After Laurie.) 



these parasites are abundant chickens should be kept away 

 from the places where the mites breed. 



Ticks. — A poultry tick, Argas persicus, occurs in South 

 Africa, Australia, and many other parts of the world. It 

 occurs to some extent in the southern part of the United 

 States. Where present it is an exceedingly destructive 



