. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. Fig. 179. Pcsition of Hyptiotes on her trapline, T. The coil cl, is shown in the upper figure, and at si in the lower. the radii was alSb very large. The space between the several radii, meas- ured at the termination of the spiral space, was about equal in all to one and seven-eighths inches. Across the snare at the beginning of the spiral space the distance was one- half inch in all. When the web is completed, the»spider takes
. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. Fig. 179. Pcsition of Hyptiotes on her trapline, T. The coil cl, is shown in the upper figure, and at si in the lower. the radii was alSb very large. The space between the several radii, meas- ured at the termination of the spiral space, was about equal in all to one and seven-eighths inches. Across the snare at the beginning of the spiral space the distance was one- half inch in all. When the web is completed, the»spider takes a position upon the trapline, sometimes ?^ \°," very close to the apex, of Spider / ^ ' but more frequently removed from it by a varying space. Sometimes she is close to the apex, at other times well removed therefrom; sometimes she hangs upon the line between the apex and the branch to which the line is suspended, and again is found close up to the branch, even rest- ing her abdomen against it. II. The position of the spider upon her trapline is very peculiar, and worthy of careful study, for it gives a clue to the curious phenomenon which is now to be described. Her face and fore feet are Usine the towards her triangular snare. The trapline is held within the prmg ^^g^ ^^^ pairs of claws, which are placed near each other (see Fig. 179, upper figure), and is drawn so tiVbtly tliat cvory por- tion of the wedge shaped web is perfectly taut, as rep- resented in Fig. 180. Upon applying the lens to the spider as she thus hangs with back downward, it will be seen that between the second pair of legs and the third pair of legs, tlio line is also taut. This is its condition according to most of my observations, but it seems that sometimes it is slightly slackened, as shown in the lower figure in the cut. (Fig. 179.) Carrying the lens along to the short third pair of legs we see that they are bent at the knee, and the claws approach each other at the trapline, which they firmly
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectspiders, bookyear1889
