PATHOLOGY. Ill 



single horse in another part of the field, slily t& 

 creep under his tail, and to use some gentle titra- 

 tion, in order to make the creature open his funda- 

 ment ; and, when a little open, has ventured to 

 creep in, where she finds herself in a proper place 

 for the depositing her eggs. After this the horse 

 has kicked and capered, as if mad, and continued 

 so for upwards of a quarter of an hour. 



The worms hatched from* these eggs soon find 

 their way farther up the intestines, and often pe- 

 netrate into the stomach. After a sufficient time 

 for acquiring their destined growth, they naturally 

 quit the stomach, in order to get towards the- 

 lower part of the intestines, and are either voided 

 with the dung, or of themselves crawl out. 



There is nothing singular in the figure of these 

 worms. They are larger than those of the com- 

 mon flesh-fly, and smaller than those of the ox-fly : 

 they are somewhat of a conic figure, their heads 

 being pointed, and their posterior part much 

 larger ; they are each provided with two crusta- 

 ceous hooks, by which they lay hold, and pull 

 themselves along, by that means, and adhere so 

 firmly to the coats of the intestines, as to prevent 

 their being forced out of their habitation by the 

 foeces, before they are ripe for their chrysalis state, 



