Bots 335 



The only medicinal treatment that gives any results 

 is 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 scraping 

 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 larvas, 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 



