17$ DIFFERENT SPECIES OF INSECTS, &C. 



parent eggs, which are by a fine membrane fast- 

 ened to the leaves ; and thus we are secured from 

 the danger of a succeeding brood. , 



This process may to some have the appearance 

 of a tedious operation ; and, indeed, when Vines 

 are injudiciously trained, it certainly must be at- 

 tended with great trouble : but it is very easily 

 performed upon Vines trained in the regular 

 method here set forth, and a single operation is 

 generally sufficient for a whole season. 



I have commonly given a 'general dressing to 

 the Vines in the Pine-stove at Welbeck, as soon 

 as I have observed the Acari make their appear- 

 ance upon any part of them ; and I have seldom 

 found it needful to repeat the operation during 

 the summer. 



I shall just beg to observe, that sulphur alone is 

 sufficient for the above purpose ; but the small 

 quantity of snuff recommended to be used along 

 with it renders the mixture equally powerful and 

 fatal to the Thrips also, and therefore the more 

 advisable. 



