. Elementary entomology. Entomology. Fig. 169. The bittersweet tree-hopper {Enchoiopa binotata Say). Adult (side and bacii views) and egg mass. (Much enlarged) (.•\fter Lugger) their egg laying. The different broods have been carefully mapped, so that it is possible to foretell the appearance in any given locality where the insect occurs.^ Plant-hoppers. The next three families may be grouped together under the term "plant-hoppers," as they jump off suddenly when disturbed. They are small insects, usually not over one fourth of an inch long, and suck the sap from the leaves and stems
. Elementary entomology. Entomology. Fig. 169. The bittersweet tree-hopper {Enchoiopa binotata Say). Adult (side and bacii views) and egg mass. (Much enlarged) (.•\fter Lugger) their egg laying. The different broods have been carefully mapped, so that it is possible to foretell the appearance in any given locality where the insect occurs.^ Plant-hoppers. The next three families may be grouped together under the term "plant-hoppers," as they jump off suddenly when disturbed. They are small insects, usually not over one fourth of an inch long, and suck the sap from the leaves and stems of their food plants. The tree-hoppers {Alcin- bracidac) have been called the '' brownie insects," for their bi- zarre shapes are often comically grotesque. The prothorax is prolonged back over the abdomen and is often produced forward or up- ward into horns or crests, as shown in Fig. 169. One of the most common species is the buffalo tree-hopper {Ceresa bnbalns), which lays its eggs in the stems of weeds and young fruit trees, causing large knotty scars on the twigs. Another small brown species {Enchcnopa binotata) is common on the bittersweet vine, the projecting prothorax looking exactly like a thorn on the stem. Few species of this family are sufificiently numerous to do serious damage. - Here and there on weeds, grass, and tree foliage will be found a little mass of froth, within which may be found a small nymph, which is busily pumping the sap out of the plant, thus causing the froth which was formerly supposed to be voided by tree frogs and was termed '' frog spittle," — hence the insects of this family. Fu;. 170. Mass of spit- tle produced by the nymph of a frog-hop- per, or spittle-insect 1 See Bulletin No. 7/, Bureau of Entomology, United States Department of Agriculture, for a very complete and interesting Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
