. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . lishes herself, and from this point stretches out lier trajdines and pro-ceeds to spin her orb, swinging it upon the .strong cables or foundationlines of her retitelarian system. Her method, as far as I have been ableto judge, is precisely the method of Thcridium and other true Lineweavers, COMPOSITE SNARES AND SECTORAL ORBS. 135 and, indeed, may be described as the method which Agalena also uses whenspinning the retitelarian supports o
. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . lishes herself, and from this point stretches out lier trajdines and pro-ceeds to spin her orb, swinging it upon the .strong cables or foundationlines of her retitelarian system. Her method, as far as I have been ableto judge, is precisely the method of Thcridium and other true Lineweavers, COMPOSITE SNARES AND SECTORAL ORBS. 135 and, indeed, may be described as the method which Agalena also uses whenspinning the retitelarian supports of her long sheeted snare. The peculiar snare of LabjTinthea and other spiders making a compositeweb appears to be a larger development of a habit which is seen to a greateror less degree in the genus Argiope. In considering the particularA Devel- gpinningwork of this genus I have already called attention to thefact that both Cophinaria and Argyrasi>is suspend the upper foun-dation lines of their orbs to a series of intersecting straight lineswhich are spun with more or less consistency to the overhanging and sur-rounding foliage. This sys- tern of crossed lines is veryfrequently carried downwardto one side of the orb andsometimes upon both sides,so that it forms what I havecalled the protective wings orfenders. If the reader willcompare the more i)erfect andpermanent spinning habit ofLabyrinthea and Triaranea withthat which is described and fig-ured as the work of Argiope, hewill see the close resemblance be-tween the two. One may thereforesay that what appears as a rudimentaryhabit, or a habit more or less developed inthe case of Argiope has appeared as a perveloped and fixed habit in the S2:)inning behavrinthea. There is a marked peculiarity in the fa Labyriuthea chooses for her snare. ThisQ-, dead and leafiess bush, or a leafless part of branch. The habit is quite persistent, and Ievery well established habitat of the species. It is truespin her snare among le
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