. Elementary entomology. Insects. THE TRUE BUGS 12 (Cercopidae) are called "frog-hoppers" or :'; Within this frothy mass the little nymph molts and grows and finally forms a little clear space about its body, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonly in evidence, few of this family are injurious. The leaf-hoppers (Jassidae) are among the most abundant of the Homoptera. Take a net and sweep back and forth in any meadow and you will secure hundreds of them, Professor Herbert Osborn having est
. Elementary entomology. Insects. THE TRUE BUGS 12 (Cercopidae) are called "frog-hoppers" or :'; Within this frothy mass the little nymph molts and grows and finally forms a little clear space about its body, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonly in evidence, few of this family are injurious. The leaf-hoppers (Jassidae) are among the most abundant of the Homoptera. Take a net and sweep back and forth in any meadow and you will secure hundreds of them, Professor Herbert Osborn having estimated that frequently over a million live on an acre of grassland. They are more slender than the two preceding families, from an eighth to a fourth of an inch long, and of a brownish, green, or red color, the green and red often being arranged in stripes, giving a very striking coloration. The grape leaf-hopper (Typhlo- cyba conies], commonly called the grape thrips (although it is not a true thrips), is the most serious enemies of the vine. In late summer the foliage will often be brown as a result of their work, and a slight jar will cause them to fly off in clouds. They are small yellowish hoppers, scarcely an eighth of an inch long and strikingly marked with red and black. A yellowish-green species, the rose leaf-hopper (Empoasca rosac], often does considerable injury to rose foliage, and a similar one, the apple leaf-hopper (Empoasca mali], is found on the. apple and frequently becomes a serious pest in the nursery. The presence of these leaf-hoppers is always indicated by the numerous white cast skins of the nymphs clinging to the undersides of the leaves. Leaf-hoppers fly to lights in large numbers. They hibernate as adults, and the eggs are usually laid just beneath the surface of the leaf of the food Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of
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