. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 52 INSECTS INJURIOUS TO THE APPLE the outer gummy covering and egg-shell, and deposits its eggs within the egg of the tent-caterpillar, where the young grubs of the parasite hatch and feed upon the contents of tlie egg- shell of our enemy. A small mite, very similar to that shown in Fig. 31, is also very destructive to these eggs, eating into them and feeding on their occupants. Two larger Ichneumon flies prey upon the caterpillar, Pimpla conquisitor (Say) (Fig. 42) and Ichneu- mon Iwtus Brull6, as
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. 52 INSECTS INJURIOUS TO THE APPLE the outer gummy covering and egg-shell, and deposits its eggs within the egg of the tent-caterpillar, where the young grubs of the parasite hatch and feed upon the contents of tlie egg- shell of our enemy. A small mite, very similar to that shown in Fig. 31, is also very destructive to these eggs, eating into them and feeding on their occupants. Two larger Ichneumon flies prey upon the caterpillar, Pimpla conquisitor (Say) (Fig. 42) and Ichneu- mon Iwtus Brull6, as well as one or more species of Tachina flies, two-winged in- sects a little larger than the common house-fly, similar to Fig. 46. All these latter parasites watch their opportunity when the growing caterpillar is feeding, and deposit their eggs on or under the skin of their victim, which shortly hatch, when the grubs burrow into the bodies of the tent-caterpillars and feed on them, carefully avoiding the destruction of the vital organs. The infested larvse usually reach maturity and construct their cocoons, but after a time, instead of the moth, one or more of these friendly insects make their appearance. Several preda- ceous insects also devour the larvae; these are referred to in detail under No. 21. No. 21.—The Forest Tent-caterpillar. Clisiocampa sylvatica Harris. This insect closely resembles the common tent-caterpillar, No. 20. The moth (6, Fig. 43) is of a similar color, but paler, or more yellowish. The space between the two oblique lines is usually darker than the rest of the wing, and the lines themselves are dark brown instead of whitish. In the figure, a represents the egg-cluster, c one of the eggs, much enlarged, as seen from the top, d a side-view of the same. The eggs of this species may be distinguished by their almost uniform diameter and by their being cut off squarely at each end. The number of eggs in each cluster is usually. Please note that these images
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