. Synopsis of the North American Syrphidae [microform]. Syrphidae; Diptera; Syrphidés; Diptères. 4^ fe B lUlM | |io "^" H^H 1^ i^a lllllio i 18 V] 71 ^ .<^ ^j» o /. 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Williston, Samuel W. (Samuel Wendell), 1851-1918. Washington : G. P. O.
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Keywords: ., book, bookcentury1800, bookdecade1880, bookpublisherwashingtongpo