we might advance in knowledge of means of saving our 
crops from depredation. 
At present we know little compared to what we need 
to know of the influence of weather, but there is one 
principle that may be rested on: insects are suited 
to certain conditions ; place them, and especially in 
their early stages when they are most in our power, in 
other conditions, and you are certain to diminish their 
numbers. 
Dunster Lodge, 
NEAR ISLEWORTH. 
W EST, NEWKAK AMD CO., PRINTERS, HATTON GARDEN, LONDON, E.C. 
