Bots 335 
The only medicinal treatment that gives any results 
1s carbon disulfide given in capsules. The horse should 
have little food the previous day. Beginning in the 
morning, give two drachms of carbon disulfide in a cap- 
sule every hour until four doses have been given, and 
follow with a purge of six drachms of aloes. The prac- 
tical treatment is preventive, i. e., destroying the adult 
fly as soon as she is observed about horses, or seraping 
the eggs from the hair with a sharp-bladed knife once 
a week. This practice will prevent the eggs from hatch- 
ing and the bots from getting into the horse’s stomach. 
The giving of medicines internally to remove bots is 
useless. 
BOTS IN CATTLE 
There are two cattle bot-flies, or ‘“warble-flies” as 
they are often called, that are closely related and 
resemble each other in appearance and _ life-history. 
Only one of these (Hypoderma lineata) is found in the 
United States; this one occurs most frequently in 
the southern parts, although it is generally dis- 
tributed. 
The adult of this species is about the size of the 
honey-bee. She deposits her eggs in summer on the 
skin of cattle in the region of the heel, causing the 
animal much discomfort. When the animal licks 
the part, the eggs are taken into the mouth, where 
they hatch; and the larve, after remaining for some 
time in the esophagus, or gullet, finally work their 
way into the cellular tissue beneath the skin of 
the back. Here they remain and develop until early 
