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FAMILIES. 



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71 p. 2 col. pi. 25^"". 



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Ip. 1., [180]-192p. illus. 2U™. 



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210-211 p. 24»". 



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Fitch, Asa. The Hessian fly, its history, character, transformations and habits. 

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63 p. pi. 33™. 



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