Severe case of demodectic 

 mange. Above: Closeup of 

 nodule. (Courtesy of 0. W. 

 Baker, Cornell University.) 



Prepared by 

 animal disease wd parasiik research divisio 

 Agricultural Research Service 

 Washington, D. C. Issued Au< 



For sale b) the Superintendent of Documents, U. S. Government Prin 

 Washington 25, D. C. Pri.e 5 cents. 

 US GOVERNMENT PRINTING OFFICE: 1958 O — 466219 



