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Taglagallo Remarcafkus Directory 04
Page 09
Spiders, which do not undergo such changes as do most of the common, six-footed insects, winter either as eggs or in the mature form. The members of the "sedentary" or web-spinning group, as a rule, form nests in late autumn, in each of which are deposited from fifty to eighty eggs, which survive the winter and hatch in the spring, as soon as the food supply of gnats, flies, and mosquitoes appear. The different forms of spiders' nests are very interesting objects of study. Some are those close-spun, flat, button-shaped objects, about half an inch in diameter, which are so common in winter on the under side of bark, chunks and flat rocks. Others are balloon-shaped and attached to weeds. Within the latter the young spiders often hatch in early winter, make their first meal off their empty egg cases, and then begin a struggle for existence, the stronger preying upon the weaker until the south winds blow again, when they emerge and scatter far and wide in search of more nutritious sustenance.
This is a wonderful age in many respects. In none, however, more wonderful than in the wide-spread diffusion of knowledge. The ordinary people now understand more of nature's secrets than the wise men of old. They are to-day interested in researches that a former generation would have relegated to the scholar and the man of leisure. No department of knowledge is retained for the researches of a favored few. The farmer, the mechanic, and the man of business are alike interested in a knowledge of prehistoric times. The rude implements of the past appeal to the curiosity of all. We arise from a study of the past with clearer ideas of man's destiny. Impressed with the great advancement in man's condition from the rude savagery of the drift, to the enlightened civilization of to-day, what may we not hope the advancement will be during the countless ages we believe a beneficent Providence has in store for his creature, man?
I say _almost_ universal, because even among birds there are a few kinds which have not to this day progressed beyond the alligator level. Australia is the happy hunting-ground of the zooelogist in search of antiquated forms, elsewhere extinct, and several Australian birds, such as the brush-turkeys, still treat their eggs essentially on the alligator method. The cock birds heap up huge mounds of earth and decaying vegetable matter, as much as would represent several cartloads of mould; and in this natural hot-bed the hens lay their eggs, burying each separately with a good stock of leaves around it. The heat of the sun and the fermenting mould hatch them out between them; to expedite the process, the birds uncover the eggs during the warmer part of the day, expose them to the sun, and bury them again in the hot-beds towards evening. Several intermediate steps may also be found between this early stage of communal nesting by proxy and the true hatching instinct; a good one is supplied by the ostrich, which partially buries its eggs in hot sand, but sits on them at intervals, both father and mother birds taking shares by turn in the duties of incubation.
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