. The book of bugs. . Of True Bugs in General. 79 damage as an order. The phylloxera, that nearly ruined France's vines, and cost her far more than the indemnity she paid to Germany for the Franco-Prussian war, is a bug, a plant-louse. The powers of reproduction of plantrlice are simply beyond the mind's ability to conceive. Huxley, rather underestimating than overestimating the numbers of their offspring, computed that the uninterrupted breeding of ten generations from a single ancestor would produce a mass of organic matter equiv- alent to the bulk of five hundred million human be- ings. Tak
. The book of bugs. . Of True Bugs in General. 79 damage as an order. The phylloxera, that nearly ruined France's vines, and cost her far more than the indemnity she paid to Germany for the Franco-Prussian war, is a bug, a plant-louse. The powers of reproduction of plantrlice are simply beyond the mind's ability to conceive. Huxley, rather underestimating than overestimating the numbers of their offspring, computed that the uninterrupted breeding of ten generations from a single ancestor would produce a mass of organic matter equiv- alent to the bulk of five hundred million human be- ings. Take all the people living in the United States and pile them in a heap. Seven such heaps would not Fig I4 Winter eggs of the equal the progeny Of One hop-plant louse, and shriveled i i A 11 ii • i -i skin of the sexual female that plant-louse. All their biuk laid thern comes from vegetation, and the more the world conies under cultivation the greater the amount taken from garden stuff as compared with weeds and wild plants that have no economic value. That mound seven times as big as the population of the United States would represent nothing but stealings, waste. From a single ancestor, Huxley said. How can that be ? \Yhy not a pair ? Because for generations there are no fathers or brothers. Take for an example the hop-plant louse, that certainly has done all in its power to ruin the hop industry. There are generally plum trees to be found near hop-yards. On these the aphids put in their time while waiting for the hops to come up. An egg hatches out a wingless female. In two or three days this stem-mother, so to speak, brings. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sutherland, Harvey. New York ; London : Street & Smith
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