3 



1 8 Mr. Clark'/ Ohfervatiorn on the Genus Oejlrus. 



and tLofe who wifh to obtain t'nem for cabinets of natural hif- 

 torv, or for exaaiiratinn, will aUb find this the moft effedlual way. 



We know of no medicine that will detach them from the fto- 

 mach or intcftines, though there are not wanting abundance of 

 infallible noftrums among the very numerous profefibrs of this art. 



Another both eafy and efFe£tual mode, at lead for the GE. Eqiii^ 

 is to deftroy the eggs which are depofited on the hairs of the horfc, 

 and are eafily fcen and removed by a pair of fciffars, or by means 

 of a brulh and warm water. 



In the flieep it will be much more difficult to prevent or deftroy 

 them by anyof.thefe means; particularly if they are feated in the 

 maxillary finufes: in this cafe trepanning would be infufhcient, as 

 they would probably be concealed among the convolutions of the 

 .turbinated bones. 



JPerhaps the removal of the fheep to a diftant pafture, during 

 the months of June and July, while greateft part of the bots are 

 yet on the ground in the chryfalis ftate, and not bringing them on 

 the pafture again till the fetting in of the winter, would be the 

 means of deftroying them moft efFeftually ; and if repeated for two 

 or three years fucceffively, when they are particularly troublefomc, 

 the farmers might eventually find their account in it. 



On the other hand, notwithftanding the apparently unnecefTary 

 exiftence and cruel efFe£ls of the Oejlri, they are probably not alto- 

 gether without an ufe, or were defigned by Providence to add, with- 

 out a recompenfe, to the numerous fufferings of thefe ufeful and 

 laborious creatures. 



A phyfiological view of their efTeils will, perhaps, beft juftlfy 

 their exigence, and fave them from fuch an imputation. 



The larvee of the Oejlri, when applied under proper reftriftions, 

 and to a certain extent, may b% of greater utility than from our 



prefcnt 



