Tie 2 STORRS AGRICULTURAL EXPERIMENT STATION. 
portions of the body where they are not easily dislodged. The 
injury done by the horni fly is by stinging, much like the mos- 
quito. By means of a fine lancet they pierce the skin, and suck 
the blood through the tube or sheath. A small amount of irri- 
tating saliva is secreted in the operation, which causes congestion 
around the wound and probably more pain than the piercing. 
They appear in swarms, and feed with the wings spread. The 
eggsare placed in the fresh droppings of the cow, and the larvee 
can exist only in the soft, almost liquid manure. The life cycle 

Fig. 15. Showing bull covered with horn flies. 
from egg to fly is about fifteen days. Some individual animals 
suffer more than others, and dark colored animals more than 
light colored. These flies follow cattle to the barn at night, and 
remain with them all the time. 
Remedies:—In response to a demand for the relief of stock 
from the annoyance of flies, various remedies have been sug- 
gested: 
1. A machine for catching flies from the backs of animals as they 
entered the stables.. 
2. Destruction of larve in the droppings by application of lime or 
the immediate spreading and drying of the same. 

