Mr. CtARK'i Obfcrvatiom on the Genus OeJIrus. . 7. 



\youId kill it ; or by punfluring the /^jrva with a hot needle, in.iO- 

 duccd through the apertures in the (kin, or even by fimple prefTure, 

 they may be deftroyed, afterwards extraifling them, or leaving them 

 to floLigh away, which I have frequently obferved they do when 

 cruflied 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. Equt and hainorrboidalis, thofe who have 

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

 countries where thefe flies are prevalent, might confidcrably diminifh 

 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 re8um, where they remain for fome 

 time before they fall to the ground.. 



The deftrudion of a finglc one at this feafon of the year is not 

 only the death of an individual and its effects, but the almofl cer- 

 tain deftru(5lion of a numerous family; at tlie fame time it is alfo 

 highly ufeful in preventing the irritation which the fpines of the 

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

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

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

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

 awkward adion. As this moft frequently happens during warm 

 weather, it is in general attributed to mere lazinefs. 



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

 fcvere chaftifement of the horfe and vexation of the rider : on the 

 removal of the bot the cure is inftantaneous. 



If this mode of removing th^.m.was generally complied with, but 

 few coykl cfcape, and their numbers would be very much reduced; 



and 



