Report of the Commissioners . sparent wings, which isabroad early in the summer. The insect spends the winter in the chrysalis state in theground, and the flies emerge early in the season, laying their eggs, which hatch out intothe slugs, on the pear, cherry, or plum. From what I have seen of the insect, I believeit to be double-brooded, but I am not quite sure. I have never found any parasites feed-ing upon it. Many of the insects I spoke of as feeding upon the apple will feed equallyupon the pear, but this particular insect does not appear to attack the apple at all. INJURING THE PLUM TREE.
Report of the Commissioners . sparent wings, which isabroad early in the summer. The insect spends the winter in the chrysalis state in theground, and the flies emerge early in the season, laying their eggs, which hatch out intothe slugs, on the pear, cherry, or plum. From what I have seen of the insect, I believeit to be double-brooded, but I am not quite sure. I have never found any parasites feed-ing upon it. Many of the insects I spoke of as feeding upon the apple will feed equallyupon the pear, but this particular insect does not appear to attack the apple at all. INJURING THE PLUM TREE. Going now to the plum tree, I might also remark that many of the insects v^hichfeed upon the apple and pear devour as well the leaves of the plum; but there are severalspecies which particularly affect the latter. One of the chief is THE PLUM SPHINX. (^Sphinx drwpiferarum)., a large green caterpillar, with white stripes on the sides, and aprominent horn at the tail {see Fig. 8S). It attains the length, at maturity, of perhaps. FiK. 83. INSECTS AND INSECTIVOROUS BIRDS. 75 three or three and a half inches, and is correspondingly tliick. This produces a veryhandsome sphinx moth {see Fig. 84), which is a night-flying insect, and has a flight some-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
