65 
The following discussion of the insect enemies of the strawberry 
has been prepared, as far as possible, with these points in view. 
I have given first a classification, or synopsis, of insect injuries to 
this plant, arranged in the form of an ordinary key for the deter- 
mination of species in natural history, but containing no unneces- 
sary references to the insects themselves; and have added indica- 
tions of the proper remedies, in the form of figures and letters re- 
ferring to the classification of remedies on a following page. In 
taking up subsequently for description and discussion, the sepa- 
rate species of insects known to attack the strawberry, I have 
arranged these also on the same plan. grouping together under each 
subdivision of the classification of insect injuries, all the species 
now known to produce that especial form of injury. 
As an illustration of the use of the ‘‘key” given above, let us 
suppose that the strawberry grower notices, after the fruit is har- 
vested, that many of the leaves of his plants are folded or rolled 
together; and that on opening these he discovers a caterpillar in 
the fold which has evidently been eating away the surface of the 
leaf. This injury comes under ‘Injuries to the Leaf and Leaf 
Stem” (A). Looking at the next line below this in the table he 
places it at once in the class of injuries (1) done by eating away 
the tissue of the leaf. Following the key still further, he finally 
decides that it is not done by an exposed insect (b*) but by an 
insect rolled in the leaf (b**). Against this group he finds the 
references 8c, 4a, by the first of which he is cited to the discus- 
sion of the method of destroying insects of feeble locomotive power, 
in midsummer, after the fruit is picked, by mowing and burning 
over the field; and by the second, to the use of arsenical poisons. 
A. Injuries to the Leaf and Leaf Stem. 
1. The tissue of the leaf eaten away. 
a. When the plant is in fruit. 
* By an exposed insect, 4c, 3a. 
** By an insect concealed in a rolled or folded leaf, 
da. 
b. When not in fruit. 
* By an exposed insect, 4a. 
** By a concealed insect, 3c, 4a. 
2. The tissue not eaten, but pierced, and drained of sap. 
a. A gall on the stem, 3a. 
b. Not making gall, 4cde. 
B. To the Flower and Flower Stem. 
By an exposed insect, 3b, 4c. 
By an insect concealed in a cluster of webbed leaves and 
blossoms, 3a. 
