EQUINE ENTOZOA. 345 



The male insects die, and the females live long enough 

 to deposit their eggs, which are generally about forty in 

 number. 



The hots of the horse live in the stomach in winter months, 

 leave in spring or early summer, and remain in the soil six 

 or seven weeks. 



The fly is developed in Jane to September, and after the 

 latest females have appeared all perish in October. 



The bots are as a rule comparatively harmless, but cause 

 injury where great numbers are aggregated together. They 

 may cause rupture, perforation, or tetanus. 



Treatment. — Weak carbolic solutions, cathartic medicine, 

 and ethereal solutions may be given. 



GASTROPHILUS HJEMORRHOIDALIS. — The larvse 

 are found attached to the walls of the rectum. 



GASTROPHILUS NASALIS. — The larvse attach them- 

 selves to the duodenum, near the pylorus. 



