66 THE MANGE OF THE OX. 



These parasites are very hardy, and consequently any 

 treatment to remove them must be very thorough to suc- 

 ceed. The3^ have been known to be able to exist for thirty days 

 in the moist atmosphere of a stable away from the horse, and 

 fourteen days in dry air; they may even recover after six or 

 eight weeks when subjected to moist warmth. Fecundated 

 females possess greater vital resistance than males, and 

 these more than non-fecundated females. Pastures in which 

 mangy horses have been kept are dangerous for six to tight 

 weeks to healthy horses on that account. 



Remedies. — What will kill itch-mites will also kill these 

 skin-eating mites, and any of the proposed remedies against 

 scab-insects will answer if applied thoroughly and repeatedly, 

 so as to kill the eggs as well as the mites. Not alone the 

 parts affected, but also the adjacent regions should be 

 treated. In case of common horses two parts of tar mixed 

 warm with one part of soft-soap, and well rubbed into the 

 diseased patches on the skin by means of a brush, will eradi- 

 cate the mites. 



THE MANGE OF THE OX. 

 {Psoro2)tes coniinunh var. hwls).. 

 This disease is very similar to the one caused by the mites 

 upon the horse. It usually commences at the root of the 

 tail, at the neck or withers, and gradualh' extends to the 

 head, back, shoulders and finally invades the entire surface 

 of the body excepting the limbs. 



Remedies. — The same remedies indicated for the mange 

 of the horse are applicable. The disease in either case 

 can only become serious when it has been neglected, as it 

 yields readily if the applications are repeatedly made in a 

 thorough manner. 



THE COMMON SHEEP-SCAB. 



{I^soroptes comnmnisYax. ovls). 

 The following description of this itch-mite, and the 

 different methods of curing the disease caused by its presence, 

 are copied from the bulletin No. 16 of the Minnesota Agri- 



