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The Dawn of History
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The New Mexico Bees of the Genus Megachile and a New Andrena
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Zoology in America
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Announcements
Sets forth the aims and objectives of the Agricultural Experiment Station.
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Collected Papers: Hymenoptera
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A New Titanothere from the Eocene of Mississippi
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A New Bee from California
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Two Fossil Insects from Florissant, Colorado
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Some Fossil Insects from Florissant, Colorado
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The Fauna of Boulder County, Colorado
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