. Economic entomology . Section L—TETRANYCHID^ (Spinning Mites). Genus Tetranychus {Dufour), Legs with seven joints. This genus shows a special affinity with its allies the spiders, some of the species at least being endowed like them with the power of spinning a. web, for which purpose the claws of the feet are specially adapted, being very short and much curved, and provided with long stiff hairs, some of which have globular

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