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requirement no one can fully know who has not attempted to cull from 
the literature of economic entomology good and complete descriptions 
of crop injuries due to insects. 
It is especially in synoptical and monographic articles, on all the 
insects of a single crop that this defect of treatment is most manifest. 
The insect enemies of the Apple in a single State may number more 
than two hundred, as in Illinois, while the list of distinguishable injuries 
to this fruit, classified with reference to differences of treatment, pre- 
ventive and remedial, is less than a tenth as many: and every orchard - 
ist will be glad to know these critically and to act upon this knowledge, 
while he will almost certainly balk at the requirement that he should 
become thoroughly and practically acquainted with so many insect 
species as a condition of success in apple culture. It will be a great 
step forward in our attempt to popularize the results of economic work 
and to make them immediately and practically useful, if we can con- 
vince those for whose special benefit it is done that one does not need 
to become an expert entomologist to obtain from economic entomology 
the greater part of the benefit which it has to offer to the practical 
man — a step which I believe can only be taken by habitually putting 
to the front in our articles, and especially in our synoptical discussions, 
insect injuries, their full and precise description, their classification 
and treatment, as the principal features, bringing in the insects them- 
selves — their description, habits, life histories, and the like — as second- 
ary and subordinate matter, to be avoided, indeed, entirely, unless 
there are cogent reasons for its use. The acceptance of this idea would 
lead to the bringing together from time to time of all the literature of 
economic entomology for each crop or class of crops ; to a critical over- 
hauling of it from this strictly practical standpoint; to a good deal of 
field observation and laboratory experimentation for the preparation of 
fuller and more accurate descriptions and illustrations of insect injuries 
than are now current; and especially to the breaking up and melting 
up of a great mass of entomological knowledge and the recasting of it 
in the agricultural mold. 
I think we should further distinguish in our publications and reports 
between what we may call temporary and permanent presentation. If 
we would reach the actual farmer with our publications it is useless to 
depend for any permanent influence on miscellaneous collections of 
articles such as make up the balk of our bulletins and reports. They 
may be read occasionally as received — at least such parts of them as 
chance to treat of matters specially and locally important at the time — 
but they will soon accumulate from various sources as a heterogeneous 
mass, with neither beginning nor end nor index, from which our farmer 
friends are little likely even to brush the dust. We should hence make 
regular provision, in my judgment, for the preparation of special eco- 
nomic summaries or monographs of all insect injuries to each of the 
various crops, agricultural and horticultural, prominent in this country, 
