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. They have been knownto beable to exist for thirty days 
in the moist atmosphere of astable 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 eight 
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 ofa Pae will eradi- 
cate the mites. , | | 
THE. MANGE .OF,. THE -OX: 
(Psoroptes communis var. bovis). 
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 gradually 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. 
(Psoroptes communis var. ovis). 
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- 
