. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. SCORPIONS, SPIDERS, MITES AND TICKS 207 like palpi, are sometimes one-fourth to one-half as long as the legs. The mandibles, or chela, are large and terminate in a slender sharp-pointed fang, through which poison flows when a spider bites its prey. The bite usually quickly kills insects and other small animals but as a rule does not seriously affect A few species, however, are very venomous, and a bite man. from one of them may result in great suffering, rarely in. FIG. 94.—Web of an orb-weaver, Zilla californica;
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. SCORPIONS, SPIDERS, MITES AND TICKS 207 like palpi, are sometimes one-fourth to one-half as long as the legs. The mandibles, or chela, are large and terminate in a slender sharp-pointed fang, through which poison flows when a spider bites its prey. The bite usually quickly kills insects and other small animals but as a rule does not seriously affect A few species, however, are very venomous, and a bite man. from one of them may result in great suffering, rarely in. FIG. 94.—Web of an orb-weaver, Zilla californica; the viscid threads are omitted from part of the web; a trap-line runs from the center to a retreat at one side. (Much reduced.) death. The effect of a spider's bite does not depend altogether upon the kind of spider, the condition of the victim's blood being a considerable factor. Two people may be bitten by the same kind of spider and one suffer little while the effect on the other may be very serious. The most common of the very poisonous spiders, and the only one to be much feared in this country, is the "hour-glass" spider, or "black widow" Latrodectes mactans. This is a small-sized sooty black. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; Doane, Rennie Wilbur, 1871-. New York, H. Holt and company
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