Synopsis of the North American Syrphidae
By: by Samuel W. Williston.
Series: Bulletin of the United States National Museum -- no. 31; Bulletin (United States National Museum) -- no. 31.
Publisher: G.P.O.
Published: 1886
Place of publication: Washington
Language: eng
Number of pages: 335
Subjects: Syrphidae -- North America.
Other titles: North American Syrphidæ
Notes: Includes index.