. The common spiders of the United States. Spiders. 96 THE COMMON SPIDERS spider moves along. There is nothing adhesive about the web. It serves merely as a clearing where insects may alight to rest and the spider may have a good chance to run after them. Where the web is made under plants or rocks a great number of threads are carried upward from it, which may help in stopping insects (fig. 227), as they do in the webs of Linyphia. (See p. 135.) Tegenaria derhamii. — This is a com- mon species in barns and cellars, and has probably been imported from Europe, where it is even more com- mon. Th
. The common spiders of the United States. Spiders. 96 THE COMMON SPIDERS spider moves along. There is nothing adhesive about the web. It serves merely as a clearing where insects may alight to rest and the spider may have a good chance to run after them. Where the web is made under plants or rocks a great number of threads are carried upward from it, which may help in stopping insects (fig. 227), as they do in the webs of Linyphia. (See p. 135.) Tegenaria derhamii. — This is a com- mon species in barns and cellars, and has probably been imported from Europe, where it is even more com- mon. The head is high and wide, as in T. mcdicinalis. The mandibles are less swelled in front and the eyes are closer together than in that species, and cover more than half the width of the head (fig. 229). The cephalothorax is shorter and wider across the hinder half and the abdo- men shorter than in viedicinalis, and the legs are longer and more hairy. The colors are lighter and the hairs of the whole body longer. The female is two-fifths of an inch long. The cephalothorax is pale, with two gray stripes. The abdomen is marked with a series of gray spots, formed of a middle row more or less connected with two side rows; the front of the abdomen often pale, with the markings faint (fig. 228). The legs are long, the first and fourth pairs nearly. Figs. 228, 229. Tegenaria derha- mii. — 228, female enlarged four times. 229, front of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Emerton, J. H. (James Henry), 1847-1930. Boston, London : Ginn & company
Size: 939px × 2662px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectspiders, bookyear1902
