THE HORSE-TICK 143 
force the stream back into the same vessel. The emulsion 
will form quicker if boiling hot milk is used. For dipping 
use, one gallon of the emulsion for each ten gallons ofwater 
is required. Fifty gallons of this dip will suffice for fifty 
sheep, seventy will probably answer for one hundred. Much 
depends upon the amount of waste on account of the liquor 
being carried off by the fleece.’? 
Another very effective remedy, much used in Europe, 
from where this parasite reached the United States, is the 
following one, which seems to be very simple. A small 
piece of gray mercurial salve, about the size of a hazelnut, is 
well rubbed upon each animal along the back, below the 
throat, and between the front legs, immediately after shear- 
ing. This application should be repeated after ten days to 
destroy any new intruders. 
THE HORSE-fTICK OR FOREST-FLY. 
([Hippobosca eguina Linn.). 
These parasites are winged, and attack, during summer 
and early autumn, horses, cattle, and even dogs. They in- 

Fig. 123.—Horse-tick. Greatly enlarged. Original. 
fest those parts of the animals which have the thinnest skin 
and fewest hairs, as regions about the tail and the belly. 
