. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . Fig. 424. FIG. 125. Illustrations of the orientation of the trapline, and width of the open sector. it is, its use being precisely that of the trapline fig. 126. Beii .shaped tent in whichin full orb making spiders. Near the point of * ™p= terminates, attachment to the hulj this is deltated, diverging into .several lines thatare fastened at various points to the meshes of the hub. Theother end of the trapline enters a little bell sliape
. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . Fig. 424. FIG. 125. Illustrations of the orientation of the trapline, and width of the open sector. it is, its use being precisely that of the trapline fig. 126. Beii .shaped tent in whichin full orb making spiders. Near the point of * ™p= terminates, attachment to the hulj this is deltated, diverging into .several lines thatare fastened at various points to the meshes of the hub. Theother end of the trapline enters a little bell sliaped silken tentswung amid a retitelarian maze, where it is held by the spider. (Fig. 126).Sometimes several spiral lines will cross the upper part of the opensector (Fig. 127) ; again one may see the variation shown at Fig. 128, wheretwo radii (dr dr) detached from the hub (H) are lifted out from theplane of the orb, leaving an open space (0) through which the trapline(T) passes. Another variation differs from this in having but a single de-tached radius (dr) to which cross loops (cl) pass from the marginal radiiR, R. (Fig. 129.) When weav-ing in the sp
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Keywords: ., bookcentury1800, bookdecade1880, bookidamericanspid, bookyear1889
