Horn-fly — Bots 333 
This mixture is brushed over the surface of the hair as 
often as may be necessary. There are some excellent 
anti-fly remedies on the market that can be applied in a 
fine spray from an instrument made for that purpose. 
As the flies deposit their eggs in fresh manure, their re- 
production can be stopped by spreading the manure 
where it will dry rapidly. 
BOTS IN HORSES 
Bots are the larval form of the bot-fly (G@astrophilus 
equi). The adult female is about the size of a honey- 
bee. She is frequently seen during the latter part of the 
summer flying about horses and depositing her small 
yellow eggs on the hair of the legs, breast and other 
parts of the body. When these eggs become moistened 
by the horse’s biting them from the hair, they hatch, and 
the young larve make their way from the horse’s mouth 
down his throat and attach themselves by two small 
hooks to the mucous lining of the stomach. Here they 
remain during the fall, winter and spring. In the early 
summer they loose their hold upon the stomach, pass 
out with the dung, burrow into the ground and pupate. 
The adult fly soon emerges and, after mating, deposits 
her eggs, and the life-cycle is complete. 
The larve, or “bots” as they are commonly ealled, 
are frequently found by the hundreds attached to the 
walls of the stomach (Fig. 51); and yet practieally no 
bad effects have been observed in living animals. It is 
possible that, in some instances, they may mechanically 
block the passage from the stomach into the intestines. 
