2 
are sometimes deceived by appearances, and it is true that by 
persecuting the higher order of animals they may be driven 
from a favourite spot or locality, and take shelter, so far from 
the haunts of man as to relieve him from their inroads, and 
dispose him to imagine that the species is lost; and in some 
instances we know that a country has been freed from races of 
animals, as the wolf and eagle, but they are not exterminated; 
and the latter, under favourable circumstances, would return: 
I think it therefore probable that by perseverance insects may 
be driven from a locality, for persecution is not agreeable to 
any animated being ; and this knowledge ought to encourage 
the cultivator not to relax in his efforts to free his land from 
destructive insects, but to be certain that those efforts are well 
directed.” 
“ Great benefits may be derived by selection of crops, by 
modes of cultivation, by manures and dressings, but, above all, 
by manual labour. Animals also whose economy tends to 
diminish destructive insects ought to be encouraged, and no 
doubt we are benefited, to an extent which it is impossible to 
conceive, by the parasitic insects whose instincts lead them to 
prey upon the eggs and eaterpillars of our enemies: they are, as 
we have shown in former memoirs, multiplied to an almost in- 
credible extent, and labour incessantly in their vocation. These 
are discoveries which have been gradually developed by the 
industry, perseverance, and research of the naturalist, for the 
improvement, amusement, and benefit of his fellow creatures; 
and I concur entirely with Mr. Hope that ‘ Agriculture may 
derive valuable assistance from the science of Entomology ; 
and I feel fully convinced that we can scarcely do a greater act 
of kindness, or be of more service to the farmer, than by point- 
ing out the nature and habits of those insects which destroy his 
crops.’ ” 
“ Mowing oats, and of course other corn, is considered the 
best method of getting rid of the Wireworm by Kollar, and 
other continental writers ; but they assign no reason, and it 
is difficult to explain the cause. It may be, that when com 
is reaped, the stubble being left long, rooks and many other 
birds will not resort to such fields, and consequently the Wire- 
worms revel without molestation. This is worth the consider- 
ation of the farmer; and whatever may be the cause, if the 
