. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . Agalena x ./ labyriuthea. (After uiost highly dcvclopcd iu the wcb spmumg species, Underhill.) ^^^j^-j^ |^^ ^j^^^^^ ^j^.^^ j^^^^^^ f^^. ^.j^^-j. ^^^^^ ^ ^g ^j^^, Lycosids, they are few and small in comparison, with the excep- ^°- ^- f^ J ) J . ?*? ?*? nmg gland, tion of those species which are aeronautic in their young state.^ g; duct, d; They appear to be similar in the males and females. In Agalena of Tegraaria labyrinthica the silk g
. American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . Agalena x ./ labyriuthea. (After uiost highly dcvclopcd iu the wcb spmumg species, Underhill.) ^^^j^-j^ |^^ ^j^^^^^ ^j^.^^ j^^^^^^ f^^. ^.j^^-j. ^^^^^ ^ ^g ^j^^, Lycosids, they are few and small in comparison, with the excep- ^°- ^- f^ J ) J . ?*? ?*? nmg gland, tion of those species which are aeronautic in their young state.^ g; duct, d; They appear to be similar in the males and females. In Agalena of Tegraaria labyrinthica the silk glands are of a large tubular or clavate f^jj^^^u^jj^^.^ shaj^e (see Fig. 37), as is also the case in Tegenaria domestica. hin.) xi25.(See Fig. 38.) III. This detailed description of the spinning glands may be appropriatelyfollowed by a somewhat more detailed description of the organs throughwhich they discharge for the purpose of forming the silken lines of I have supposed that all Lycosids practice ballooning; but the subject is open for inquiry,and it would be interesting if histology should point the way to a wider knowledge of \1 46 AMERICAN SPIDERS AND THEIR SPINNINGWORK. whifli the spiders spinningwork is composed. The ordinary spiiiniii,u;spool is i\ hollow, cylindrical, chitinous formation, and consists of twojoints: thst, a shorter or longer hasal cylinder, bj, whose walls are stronglybrown colored; and second, a much smaller and transparent ter-Spinnmg j^^jj^.j jq^j-^^^ ^j^ which terminates in a very fine point, providedP°° ^ with a minute opening. The spools in which the pyriformglands terminate, and Fig. 24, stand in large number on all thespinning fields. They are not alike in form of the several spinnerets,and those of the anterior spinneret especially, are r^uite differently con-structed from those of the posterior those spools of the posterior spinneretswhich receive pyriform glands, the basaljoint (Fig. 39, bj) forms everyw
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Keywords: ., bookcentury1800, bookdecade1880, bookidamericanspid, bookyear1889
