13 
Locusts, and in this example of the possibility of eggs 
tying unhatclied, but still safety buried, it seems to me 
that we may have a clue to the occasional appearance 
of some insect in a limited area where there was no 
obvious reason for its sudden appearance. 
However this may be, it is plain that we can destroy 
great numbers of eggs by throwing them out, upwards 
or downwards, from their natural place of deposit, and 
also we may diminish the quantity of eggs laid above 
ground by diminishing the number of places proper for 
egg-laying. 
The Daddy Longlegs Flies prefer damp grass for egg- 
laying ; some of our farm moths lay in the shelter of 
the large breadths of neglected weeds we see round fields 
and gardens, and by ordinary means we may clear many 
of these nurseries of coming attack away. Good liming 
is a means of keeping the Click Beetle from laying eggs 
to infest the meadow with Wireworm, and a better plan 
still is penning sheep, and feeding them on any grass 
that it is particularly desirable to protect, thus not only 
preventing oviposition, but, from the surface of the 
ground being sodden with matter injurious to insect-life, 
destroying the young grubs just beneath it. 
With some of our cabbage-root maggots we find that 
the crop escapes much better where chemical manure, 
such as superphosphate, is applied than where farm 
manure or bone-dust is given. This is very likely, 
partly owing to the chemical constituents being, as we 
have been shown, more suitable for pushing on the very 
first growth than the ammoniacal manure; but also I 
attribute it to the flies, like many other of the Antho- 
myiclcE , preferring moist decaying matter for the deposit 
of their eggs, and therefore being attracted by putre¬ 
scence. 
There are some cases in which a slightly different 
method of cultivation from that usually practised would 
at once benefit the plant, and protect it from attack. 
The Onion Fly, or flies rather,—for the researches of Mr. 
Meade, in the course of this year, have shown us that 
