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IVOR^TH jV]\J:EIMO^VTN I>Ilr»TEI^^^. 



Synopsis of the Families and Genera of North American Diptera (exclusiA'^e of 

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BXJTTER-FLIES OF IVORTH AMIERICA. 



Part 6, Vol. iii, issued 1st Jan., 1889. Contents: Papilio Nitra ; Anthocharis 

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