. Zoology : for students and general readers . Zoology. Fig. 320.—Development of the Spider.—.4, worm-like stage ; i?, primitive band ; C, ttie same more advanced, with rudiments of limbs, houses and in gardens ; its geometrical web is very regular. The large trap-door spider (Mygale) has four lung-sacs in- stead of two, as in the other spiders, and only two pairs of spinnerets. Mygale Henzii Girard inhabits the Western plains and Utah ; Mygale avicularia Linn, of South America is known to seize small birds, and suck their blood. There are probably about six or eight hundred species of spiders
. Zoology : for students and general readers . Zoology. Fig. 320.—Development of the Spider.—.4, worm-like stage ; i?, primitive band ; C, ttie same more advanced, with rudiments of limbs, houses and in gardens ; its geometrical web is very regular. The large trap-door spider (Mygale) has four lung-sacs in- stead of two, as in the other spiders, and only two pairs of spinnerets. Mygale Henzii Girard inhabits the Western plains and Utah ; Mygale avicularia Linn, of South America is known to seize small birds, and suck their blood. There are probably about six or eight hundred species of spiders in North America; their colors are often brilliant, and sometimes, from the harmony in their colora- tion with that of the flowers in which they hide, or the leaves on which they may rest, eliide the grasp of insectivorous birds. Sub-olass 4. Hexapoda.—The triregional division of the body genuine winged insects than in the Myriopods and spiders. They have compound as well as simple eyes ; two pairs 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
