Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 wedges, the broad wing-covers being flattened vertically. They may be found on the under side of leaves of various plants, par- ticularly grape, sucking the juices, preferably from'the larger veins or ribs. None of them are injurious, and the family is mentioned only that our common species may be recognized. The 'spittle-insects,' or 'frog-hoppers,' of the family Cer- copida, resemble some forms of tree-h
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 wedges, the broad wing-covers being flattened vertically. They may be found on the under side of leaves of various plants, par- ticularly grape, sucking the juices, preferably from'the larger veins or ribs. None of them are injurious, and the family is mentioned only that our common species may be recognized. The 'spittle-insects,' or 'frog-hoppers,' of the family Cer- copida, resemble some forms of tree-hoppers in their habit of laying the eggs in little, FulgoriAcB, or lantern-flies.—a, Scolops sulcipesY^b, Poeciloptera truncaticorms ; twice natural size. ^ Fig. 107. frothy, white masses. These masses of '' frog-spittle'' are often noticed in grass lands, but their true character is rarely understood. Unlike the 'tree-hoppers,' the Cercopidce never have horn- like processes or projections, but are usually squat, some- what angular, yet flattened creatures, whose popular name, 'frog-hoppers,' has been obtained by the some- what fanciful resemblance of the insects to a frog when just ready to leap. Few of these species, so far as I have any information, are sufliciently injurious to be of economic importance. They feed on a great variety of plants, but are rarely common on culti- vated crops. It is different with the 'leaf-hoppers,' or Jassides, which are Cercopid, or spittle-insect.—a, larva, en- larged; , natural size, on a leaf bearing 'frog-spittle;' c, the adult, enlarged.
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