American spiders and their spinningworkA natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . abrief description given of the female. Emerton (New England Spiders of the Family Lyco-sida, lS8o) describes the species as Lycosa vnlpina. I judge that my own name has pre-cedence. - Home Studies in Nature, Harpers Magazine, ISHO, page 71(J. ENEMIES AND THEIR IXTTJENCE. iU5 At one time twenty-eight of tliese spiders were kept under observationin the observers grounds. She visited tliem all frequently and found thatmore than half the numbe
American spiders and their spinningworkA natural history of the orbweaving spiders of the United States, with special regard to their industry and habits . abrief description given of the female. Emerton (New England Spiders of the Family Lyco-sida, lS8o) describes the species as Lycosa vnlpina. I judge that my own name has pre-cedence. - Home Studies in Nature, Harpers Magazine, ISHO, page 71(J. ENEMIES AND THEIR IXTTJENCE. iU5 At one time twenty-eight of tliese spiders were kept under observationin the observers grounds. She visited tliem all frequently and found thatmore than half the number, both males and females, had closed their doorsfirmly. Some of the burrows were situated in bits of moss, and the mosswas so cunningly arranged over them that the most expert naturalist wouldhave found it difficult to tell where they were located. Mrs. Treat hadoften tested the matter with her friends, to see if they could find oneof these concealed burrows, limiting their search to a few square inchesof space. But tliey rarely hit upon the right .spot. Mrs. Treat kindly con-tributed some of the coverings of these Tigrina burrows to my collection. Fig. 340. A vestibule and dome of vegetable debris reared over the burrow of Lycosa size. (From a cabinet specimen.) of aranead architecture. They are masses of vegetable debris, moss, grassblades, chiijpage, dry twigs, the shell of an acorn, etc., arranged in anirregular dome several inches in diameter across the base and an inch ormore in heiglit. (See Fig. 340 and 341, 342.) What is the explanation of this care shown by Tigrina in the covering:)f its den in midsummer? The closure in winter is explained The Ex-planation. l)y the natural desire to protect the burrow from frost andsnow. The closure during or previous to the moulting season isexplained by the fact that the spider requires especial protection at a period -106 AMERICAN SPIDERS AND THEIR SPINNINGWOKK. of special weakness and inabilit}- for defense
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectspiders, bookyear1890
