Insects injurious to fruits . under, they remain for atime motionless. The saw-flies have been so called from the fact that in mostof the species the females are provided with a saw-like ap-pendage at the end of the body, by which slits are cut in theleaves of the trees, shrubs, or plants on which the larvae feed,in which slits the eggs are deposited. The female of thisspecies begins to deposit her eggs early in June; they areplaced singly within little semicircular incisions through theskin of the leaf, sometimes on the under side and sometimeson the upper. In about a fortnight these eggs hat
Insects injurious to fruits . under, they remain for atime motionless. The saw-flies have been so called from the fact that in mostof the species the females are provided with a saw-like ap-pendage at the end of the body, by which slits are cut in theleaves of the trees, shrubs, or plants on which the larvae feed,in which slits the eggs are deposited. The female of thisspecies begins to deposit her eggs early in June; they areplaced singly within little semicircular incisions through theskin of the leaf, sometimes on the under side and sometimeson the upper. In about a fortnight these eggs hatch. The newly-hatched slug is at first white, but soon a slimymatter oozes out of the skin and covers the upper part of thebody with an olive-colored sticky coating. After changingits skin four times, it attains the length of half an inch or more(see Fig. 160, a), and is then nearly full grown. It is a dis-gusting-looking creature, a slimy, blackish, or olive-brownslug, with the anterior part of its body so swollen as to re-. 152 INSECTS INJURIOUS TO THE PEAR. semble somewhat a tadpole in form, and having a disagreeableand sickening odor. The head is small, of a reddish color, andis almost entirely concealed under the front segments. It is of a dull-yellowish color beneath, with twenty Fig. 160. 1/1 • 1 1 very sliort legs, one pair under eacli segment except the fourth and the last. After the lastmoult it loses its slimy appearance and darkcolor, and appears in a clean yellow skin en-tirely free from slime; its form is also changed,being proportionately longer. In a few hoursafter this chano;e it leaves the tree and crawlsor falls to the ground, where it buries itself toa depth of from one to three or four repeated movements of the body the earthis pressed firmly on all sides, and an oblong-oval chamber is formed, which is afterwardslined with a sticky, glossy substance, whichmakes it retain its shape. Within this littleearthen cell the insect changes to a chrysalis
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Keywords: ., bookauthorsaunderswilliam183619, bookcentury1800, bookdecade1880
