Wonfis. 5J 



and about M^ titrti^, thfey rti^y be freiqW6"H{iy %fed' fi^^ngfhg fe^ 

 extremity of tbe Rectutli. After remaining' iii dte Crysalis ^t{i't<^, 

 about two months, the fly appears; so that killing" one Hot, fhay b'c 

 tbe means of preventing the production of between four and^'ve 

 hundretl Eggs, which, in its fly-state, it would be capable of d'e^6- 

 siting on Horses; and thus prove the almost certain preventioh, 0^' 

 a numerous family.— And in order to accomplish the destruction of 

 one of the sjiecies of GEstrus, namely that which Mr. Clarke has called. 

 the Ostrus Equi, which deposits its Eg-gs on the chest, shoulders 

 and mane of the Horse ; he has suggested that their Eggs might 

 be got rid of, by means of a brush and warrhwat'ei', or by clipping 

 them off, along with a portion of the hair, witli a pair of scissai'fe', 

 ' The Eggs of the only other species, (concernin^g which any thing 

 certain is as yet known,) being deposited on the lips of the Horsif/ 

 would be by no means so easily observed or destroyed; and there-' 

 fore, the method which has been already suggested, of destroying the ^ 

 Bot, when found sticking in the sphincter of thQ Anus, or voided 

 with the I>ung, is the only one that bids fair to extirpate, or lessen 

 the number of, this species, which Mr. Clarke has denominated 

 (Estru3 Hoemorihoidalis. 



I have thus enumerated all the particulars which I consider to he 

 of consequence on the subject of Bots ; and in' doing sb, it will pi'o^- 

 bably appear to some of my readers that I haVe ticcupied their time 

 unnecesssarily. But, a complete and dispassionate investigation of 

 the subject, unconnected with any attempt to establish a new hypo- 

 thesis) seemed to me of the utmost importance, as connected with 

 the medical treatment of the Horse; inasmuch, as the philosophical 

 and learntd^ as well as the ignorant and unlettered^ have from time 



