Image from page 182 of "American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits" (1889)

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Identifier: americanspiderst188901mcco
Title: American spiders and their spinningwork. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits
Year: 1889 (1880s)
Authors: McCook, Henry C. (Henry Christopher), 1837-1911
Subjects: Spiders -- United States
Publisher: [Philadelphia] author, Academy of natural Sciences of Philadelphia
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library


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Text Appearing Before Image:
al scaffold; in the central concentrics, which correspond with the notched zone; in the form and distribution of the spirals; in the character of the • ^^1, ribJO decorations; in the manner in which the snare is swuns:ume Orb- .rii-i--i •• , weaver. rouutlation hues ni whatever site it may be placed; in the position of the spider underneath the web;—in all these pointsthe spimiingwork of Uloborus is analogous to that of Orbweavers, espe-cially Tetragnatha, or of the Orchard and Hunchback spiders. There is, however, one important difference. The spiral concentrics, in-stead of being composed of single lines covered with viscid beads, as in^ . typical snares of the Orbitelarite, are composed for the most part Beads ^^ several very delicate filaments, although in certain parts thethread is single. To threads and filaments alike are often at-tached a number of minute objects, opaque, and for the most part amor-phous; but many of them being very small globes of a yellow color, per-

Text Appearing After Image:
Fici. 164. Circular ribboned decorations on the snare of Uloborus. haps the pollen of flowers. They adhere to the single threads, but morefully to the portions containing several distinct filamenis. These opaqueobjects have so much the appearance of beads that a careless observer islikely to be deceived by them; at least, I was thus led astray in my firststudies of the Uloborus snare. There are, however, no viscid beads uponany of the lines, although the thread is certainly very adhesive, chieflyI suppose by reason of the delicacy and flocculence of the fibre. Thesmooth point of a pencil touched to it does not adhere; but when myfinger was laid ujion a spiral it adhered as in the case of a beaded web.In this respect the snare of Uloborus resembles that of the Triangle spider, Hyptiotes cavatus, and also certain species of the Clubion-Relations ijgg^ g^^j^jj ^^ Dictyna philoteichus and other species of that genus,culent ^^^ flocculent web was discovered and described by Blackwall,Spira


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bookidamericanspiderst188901mcco bookyear1889 bookdecade1880 bookcentury1800 bookauthormccookhenrychenrychristopher18371911 booksubjectspidersunitedstates bookpublisherphiladelphiaauthoracademyofnaturalsciencesofphiladelphia bookcontributormblwhoilibrary booksponsormblwhoilibrary bookleafnumber182 bookcollectionbiodiversity bookcollectionmblwhoi bookcollectionblc bookcollectionamericana bhlcollection bhlconsortium

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