Insects injurious to fruits . ly. Its surface isirregular and its color red, while the internal structure isspongy. If these galls are opened about the middle of July, 332 INSECTS INJURIOUS TO THE STRAWBERRY. there will be found in each, about the centre, a small, milk-white, footless grub, semi-transparent, with a smooth, glossy-skin, a wrinkled surface, and a few fine, short hairs. Its jawsare pale brown, and its length at this period is about one-sixteenth of an inch, the body tapering a little towards eachextremity. This insect doubtless changes to a pupa withinthe gall, from which flies e
Insects injurious to fruits . ly. Its surface isirregular and its color red, while the internal structure isspongy. If these galls are opened about the middle of July, 332 INSECTS INJURIOUS TO THE STRAWBERRY. there will be found in each, about the centre, a small, milk-white, footless grub, semi-transparent, with a smooth, glossy-skin, a wrinkled surface, and a few fine, short hairs. Its jawsare pale brown, and its length at this period is about one-sixteenth of an inch, the body tapering a little towards eachextremity. This insect doubtless changes to a pupa withinthe gall, from which flies escape later in the season, or earlythe following spring. No. 200.—The Strawberry maculaius Norton. This insect in the perfect state is also a four-winged fly,which in the larval condition is very destructive to the leavesof the strawberry. The accompanying figure, 346, illustratesthe insect in its various stages; 1 shows the under side ofthe pupa, 2 a side view of the same, 3 the perfect fly, all Fio. magnified; 4 the larva crawling, 6 the same at rest, 5 theperfect insect with its wings closed, and 7 the cocoon, all ofthe natural size; 8 one of the antennae, and 9 an egg, bothmagnified. The egg is placed within the substance of thestem of the leaf early in May by means of the peculiar saw- ATTACKING THE LEAVES. 333 like apparatus with which the female is provided. It isabout one-thirtieth of au incli long, and of a white color;its presence produces a slight swelling on the stalk, and bysplitting the stalk so as to open the swelling the egg may befound. The effcrs absorb moisture from the stem and increasein size, and in about a fortnight hatch, when the young larvoeat once besin to feed on the leaves. At first thev attract butlittle attention, as the holes they make in the leaves are small,but as they increase in size they often completely riddle thefoliage and destroy its usefulness. When full grown, they are nearly three-fourths of an inchlong, of a
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Keywords: ., bookcentury1900, bookdecade1900, bookidin, booksubjectinsectpests
