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3-18

Special Instructions for Mounting and Preparing the Smaller
Forms.

III. THE CLASSIFICATION OF MOTHS

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The Difficulties of Classification. Various Views Entertained
by Writers. Key to the Families of North American Heterocera.

IV. BOOKS ABOUT THE MOTHS OF NORTH AMERICA .

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Early Writers. Periodicals. General Catalogues and Lists.
General Works Containing Information as to the Moths of
North America. Works Particularly Useful in Studying the
Different Families of the Moths of North America,

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