Mr, Clark's Obfcrvailons on the Genus Ocjlrus. 317 



would kill it ; or by puncturing the larva: with a hot needle, intro- 

 duced through the apertures in the fkin, or even by fimple pre flu re, 

 they may be deitroyed, afterwards extracting them, or leaving them 

 to (lough away, which I have frequently obferved they do when 

 crufhed by a blow from the horn of the beaft, or by any other 

 accident, without any material injury to the animal. A man em- 

 ployed for this purpofe might, in half a day, in this manner deftroy 

 every bot on a large common. 



In regard to the CE. Equi and hamorrhoidalis, thofe who have 

 horfes which have been much out to grafs the preceding year, in 

 countries where thefe flies are prevalent, might confidcrably diminim 

 their numbers by examining the horfes occafionally for the bots 

 during the months of May and June, when they will be found 

 hanging to the extremity of the reclum, where they remain for fome 

 time before they fall to the ground. 



The deftruclion of a fingle one at this feafon of the year is not 

 only the death of an individual and its effecls, but the almoit cer- 

 tain deftruetion of a numerous family; at the fame time it is alfo 

 highly ufeful in preventing the irritation which the fpines of the 

 bot occafion to the anus. If the horfe is ufed on the road while 

 the bot is adhering to this part, the irritation becomes diftrefnng, 

 and caufes him to move very awkwardly and fluggifh, as though 

 tired ; and if feverely beaten he foon relapfes again into the fame. 

 awkw r ard action. As this moft frequently happens during warm 

 weather, it is in general attributed to mere lazinefs. 



Thefe fymptoms I have been a witnefs to feveral times, to the 

 fevere chaftifement of the horfe and vexation of tfye rider: on the 

 removal of the bot the cure is inftantaneous. 



If this mode of removing them was generally complied with, but 

 few could efcape> and their numbers would be very much reduced ; 



and. 



