Mites Injurious to Domestic Animals. 45 



Chorioptic or symbiotic mange is usually confined to the lower 

 part of the limbs and root of the tail. Sometimes this complaint 

 causes horses to stamp when in the stable or to knock their feet 

 together, and in doing this the coronets of the feet may be damaged. 



FIG. 27. 



Pterolichus sp., from interior of quills of feathers of North American 



fowl, female from below, x 104. (a) Tarsus of second leg of same 



greatly enlarged. (b) Denticle on first tarsus very greatly 



enlarged. (Original.) 



Leaflet No. 274, issued by the Ministry of Agriculture and 

 Fisheries, should be consulted by those interested in parasitic 

 mange in horses, asses, and mules. Remedies, symptoms, etc., 

 will be found in this leaflet. 



