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A Revision of the genus Sympherobius Banks (Neuroptera: Hemerobiidae) of America North of Mexico...
By Oswald JD
J. New York Entomol. Soc. 96(4):390-451, 1988
Cite: 1846055 with citation markup [cite:1846055]
full title: A Revision of the genus Sympherobius Banks (Neuroptera: Hemerobiidae) of America North of Mexico with a Synonymical List of the World Species

full text here and here. reproduction of the wing photographs is better in the BHL copy

supersedes (1)