. Insect pests of farm, garden and orchard . ate May or earlyJune in New England. Like most of the saw-flies the female isfurnished with a strong ovipositor with saw-like teeth at the * Eriocampoides limacina Retzius. Family Tenthredinidce. See C. , Circular 26, Div. Ent., U. S. Dept. Agr. INSECTS INJURIOUS TO THE APPLE AND PEAR 643 tip, with which she cuts a little blister-like cell beneath the uppersurface of the leaf, in which the egg is deposited, as shown in The egg hatches in about two weeks and the little larvamakes its way out of the cell t)ii-ough a crescent-shaped c
. Insect pests of farm, garden and orchard . ate May or earlyJune in New England. Like most of the saw-flies the female isfurnished with a strong ovipositor with saw-like teeth at the * Eriocampoides limacina Retzius. Family Tenthredinidce. See C. , Circular 26, Div. Ent., U. S. Dept. Agr. INSECTS INJURIOUS TO THE APPLE AND PEAR 643 tip, with which she cuts a little blister-like cell beneath the uppersurface of the leaf, in which the egg is deposited, as shown in The egg hatches in about two weeks and the little larvamakes its way out of the cell t)ii-ough a crescent-shaped cut. The young larva is at fii-st nearly white, except the yellowish-brown heatl, but very soon a slimy or gluey olive-colored litjuidexudes from over the entire body, giving it the appearance of aminute slug, from which it gets its name. The head is now darkbrown, appearing almost black under the slime, and the body isalso darker. The anterior segments are much swollen, concealingthe head and the thoracic leos. The abdomen is fuinished with. Fig. 497.—Illustrating method of ovijiosilion and emergence of the pearslug: a, cutting of cell beneath epidermis, showing the tip of the ovi-positor; b, the cell after the egg has been deposited; c, same afterescape of the larva—all much enlarged. (After Marlatt Dept. Agr.) seven pairs of prolegs, the usual pair on the last segment beingwanting so that the tip of the abdomen is slightly elevated. Thelittle slugs commence eating out small bits of the upper surfaceof the leaf, which they gradually enlarge until nearly the wholeupper surface is denuded, leaving merely a network of veins,held together by the brown epidermis of the lower surface, whichis nearly intact. Leaves thus injured turn brown, die and dropso that a tree will sometimes be nearly defoliated, except for thenew growth which starts out. The larvae grow rapidly, becomingfull grown in about twenty-five days, when they are about one- 644 INSECT PESTS OF FARM, GARDEN AND
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