ADVERTISEMENT. XV 



its nounfliment, and on vv-hlcli It generally lay^i 

 its eggs, and that on the moft concealed parts of 

 the plant ; and the plant, and infed: which at- 

 tacks it, are always natives of the fame climate,. 

 and therefore endure the fame degrees of heat 

 and cold. 



In hopes to be enabled at feme future op- 

 portunity to dlfcufs and inveftigate thefe mat- 

 ters, I fhall for the prefent forbear to make any 

 more obfervations on the fubjedt : But from the 

 few which I have made, may be drawn the fol- 

 lowing conclufion, viz. That, when certain 

 plants are infefted and attacked by their natural 

 tribe of infeds, it is an exceedingly nice point 

 and curious operation to exterminate them, with- 

 out injuring the plants, or flopping them 

 their natural growth. 



