Archive image from page 229 of American spiders and their spinning. 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 CUbiodiversity1121211-9742 Year: 1889 ( 230 AMERICAN SPIDERS AND THEIR SPINNINGWORK. Again, it is obvious that in cases where an Orb weaver is dependent upon the wind to carry her foundation lines from the starting point to a point of attachment, the length of that line will necessarily be deter- ?|°® mined by circumstances. The cord may float off a goodly dis- ' ' tance
Archive image from page 229 of American spiders and their spinning. 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 CUbiodiversity1121211-9742 Year: 1889 ( 230 AMERICAN SPIDERS AND THEIR SPINNINGWORK. Again, it is obvious that in cases where an Orb weaver is dependent upon the wind to carry her foundation lines from the starting point to a point of attachment, the length of that line will necessarily be deter- ?|°® mined by circumstances. The cord may float off a goodly dis- ' ' tance before striking an object, or may entangle soon. In the latter case, as the foundation line will be limited, the snare will be dimin- ished accordingly. I have known a Furrow spider to make a web a foot wide one night, and the next night, when becalmed and prevented from stretching a foundation in her old site, spin an orb four inches in diameter. Young spiders make small webs, and invariably very perfect ones. The irregular, abridged, or patched snares which one sometimes sees, when not Fig. 217. Typical orbwebs, Epeira strix. the result of wear and tear, are those of adults; never, I believe, of young Orbweavers. The following are a few measurements of the orbs of some of our com- mon species. Epeira insularis: inches, six by six; thirteen by eleven; four- teen by fourteen; twenty by fourteen; fourteen by fourteen. Epeira strix : two by one and one-half; twelve by eight; nine and seven-eighths by nine and one-half. These are measurements of the orb alone, not including the foundation spaces. It will be seen that only a part of the above orbs are nearly circular; more frequently, perhaps, they are somewhat elliptical, the vertical diameter being the longer. The central space occupies about one- third or from one-third to one-fourth of the orb, the spiral space on either side about equaling it in width. The hub approximates the geographical
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