Elementary entomology (1912) Elementary entomology . elementaryento00sand Year: 1912 THE TRUE BUGS 125 (Ccrcopidac) arc called 'frog-hoppers' or 'spittle-insects.' Within this frothy mass the little n)'mph molts and grows and finally forms a little clear space about its bod)-, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonh' 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 th
Elementary entomology (1912) Elementary entomology . elementaryento00sand Year: 1912 THE TRUE BUGS 125 (Ccrcopidac) arc called 'frog-hoppers' or 'spittle-insects.' Within this frothy mass the little n)'mph molts and grows and finally forms a little clear space about its bod)-, around which the foam dries, forming a little chamber within which it transforms to the adult. Though very commonh' 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 comes), 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 {Einpoasca jvsac), often does considerable injur}^ to rose foliage, and a similar one, the apple leaf-hopper {Einpoasca iiiali), 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. The}' hibernate as adults, and the eggs are usually laid just beneath the surface of the leaf of the food plant. Fig. 171. Aphrophora ^-iiotata Say, a common frog-hopper (. Lugger)
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