THE COFFEE BUG. 61 



suggested up to that time had utterly failed, and that 

 none at once cheap and effectual was likely to be dis- 

 covered. He seems also to have been of opinion that 

 the insect was not under human control ; and that 

 even if it should disappear, it would only be when it 

 had worn itself out as other blights have been known 

 to do in some mysterious way. Whether this may 

 prove to be the case or not, is still very uncertain, but 

 everything observed by Dr. Gardner tended to indicate 

 the permanency of the pest. 



