Report of the Commissioners . te dead, and appar-ently with a fungoid growth upon them. PROPERLY A LOCUST—THE TRUE GRASSHOPPER. What we call a grasshopper is really a locust. The grasshopper, properly socalled, is a grayish-green insect, that feeds upon grass and foliage, and is never sufficientlynumerous to do much damage. THE CICADA. There is another insect, sometimes called a locust, which is not a locust at all, Cicada. It is a very familiar creature, and may be known by the peculiar, shrill,whizzing sound which it makes in the trees during the heat of the day. It is not verydestru
Report of the Commissioners . te dead, and appar-ently with a fungoid growth upon them. PROPERLY A LOCUST—THE TRUE GRASSHOPPER. What we call a grasshopper is really a locust. The grasshopper, properly socalled, is a grayish-green insect, that feeds upon grass and foliage, and is never sufficientlynumerous to do much damage. THE CICADA. There is another insect, sometimes called a locust, which is not a locust at all, Cicada. It is a very familiar creature, and may be known by the peculiar, shrill,whizzing sound which it makes in the trees during the heat of the day. It is not verydestructive in this country, its larvse feeding upon the roots of forest trees, and occasion-ally also on those of the apple tree. THE SEVENTEEN-YEAR LOCUST. One peculiarity of the Cicada in the United States is, that one variety of it appearsonce in seventeen years, and another once in thirteen years. This belief was long popu-larly held, and was thought to be unfounded, but Prof. Riley demonstrated that such wasreally the Fig. 31. Fig. 31 represents different stages in the life-history of the 17-year locust, (a) is the pupa ; (6) theempty pupa-case after the perfect insect has emerged from it; (c) the perfect or winged insect; {d) the per-forations in a twig for the deposition of eggs ; [e] the egg. [J/r. Bethune.\ 42 INSECTS AND INSECTIVOROUS BIRDS. THE PHYLLOXERA. To Mr. Saunders.—The l^ vafttatrix, wliicli has proved so destructive to thevineyards of France, belongs to the same tribe as the plant lice. There are two varieties,one gall-inhabiting, that is, making excrescences upon the leaves of the vine (Fig. 32.),
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
