. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE SPIDER 109 spider. If an insect should enter the web, the spider releases its pull upon the central part, and the web springs out- ward, strikes the insect, and causes it to adhere to the threads. While, on the one hand, some spiders have evolved in the direction of the construction of complicated webs, some, on the other band, have never ac- quired the web-spinning habit. Such, for example, are the wander- ing spiders, which may be classi- fied into three chief groups. (1) Crab spiders are so called be

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. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE SPIDER 109 spider. If an insect should enter the web, the spider releases its pull upon the central part, and the web springs out- ward, strikes the insect, and causes it to adhere to the threads. While, on the one hand, some spiders have evolved in the direction of the construction of complicated webs, some, on the other band, have never ac- quired the web-spinning habit. Such, for example, are the wander- ing spiders, which may be classi- fied into three chief groups. (1) Crab spiders are so called be

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Image ID: RDHRCH

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