42 



MITE PARASITES. 



gerous female mites and also we shall find larvae, 

 female imagines, and a few males. 



As the disease increases, the birds have a difficulty 

 in standing, then lameness follows, and not unusually 

 one or more of the toes fall off. As a rule it takes 

 from (3 to 12 months to run its course. Gradually 

 the fowl becomes affected in health, and either dies 

 from this disease or, as is more usual, other complaints 

 accompany it in its later stages, such as favus, diph- 

 theria, and tuberculosis of the lungs and liver, and 

 so speedily destroy the victim already weakened by 

 the subcutaneous parasites. 



The Mites. 



It appears that these mites do not occur in the 

 eo-o-state beneath the scales. The author has been 



'Oft 



Fig-. 14. 



' Scaly Leg ' Mite (Sarcoptes mutant). 

 Male and ovigerous female. 



unable to find any trace of eggs at all upon the legs 

 of numerous fowls examined. 



