Elementary entomology ([c1912]) Elementary entomology . elementaryentomo00sand Year: [c1912] THE TRUE BUGS 12 (Cercopidae) are called 'frog-hoppers' or :'spittle-insects.' 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
Elementary entomology ([c1912]) Elementary entomology . elementaryentomo00sand Year: [c1912] THE TRUE BUGS 12 (Cercopidae) are called 'frog-hoppers' or :'spittle-insects.' 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 plant.
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