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- catalog abstract "The family of Syrphidae is one of the most extensive in the order of Diptera. Nearly or quite two thousand species are known from throughout the world, and many new forms are constantly being added. They contain among them many of the brightest-colored flies, and numerous specimens are sure to appear in every general collection of insects. None are injurious in their habits to man's economy, and many of them are very beneficial. In this work, about three hundard species are described from the region north of Mexico. That there are many more species within these limits is certain, especially in the southern and western regions. The family is easily and exactly defined; with but few exceptions by the presence of a spurious vein of the wings alone; in all, by the structure of the head and the neuration.".
- catalog contributor b7779799.
- catalog created "1886.".
- catalog date "1886".
- catalog date "1886.".
- catalog dateCopyrighted "1886.".
- catalog description "Index.".
- catalog description "The family is easily and exactly defined; with but few exceptions by the presence of a spurious vein of the wings alone; in all, by the structure of the head and the neuration.".
- catalog description "The family of Syrphidae is one of the most extensive in the order of Diptera. Nearly or quite two thousand species are known from throughout the world, and many new forms are constantly being added. They contain among them many of the brightest-colored flies, and numerous specimens are sure to appear in every general collection of insects. None are injurious in their habits to man's economy, and many of them are very beneficial. In this work, about three hundard species are described from the region north of Mexico. That there are many more species within these limits is certain, especially in the southern and western regions.".
- catalog extent "xxx, 335 p. :".
- catalog isPartOf "Bulletin (United States National Museum) ; 31.".
- catalog isPartOf "Bulletin of the United States National Museum ; no. 31".
- catalog isPartOf "Publication (Smithsonian Institution) ; 653.".
- catalog isPartOf "Smithsonian Institution publication ; 653".
- catalog issued "1886".
- catalog issued "1886.".
- catalog language "eng".
- catalog publisher "Washington, D. C. : Government Printing Office,".
- catalog spatial "North America.".
- catalog subject "Diptera North America.".
- catalog subject "Q11 .U6 no.31".
- catalog tableOfContents "Index.".
- catalog title "Synopsis of the North American Syrphidae / by Samuel W. Williston.".
- catalog type "text".