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A tentative synopsis of the Hornets and Yellowjackets of America
By Joseph Bequaert
Entomologica Americana, 1932
Cite: 859636 with citation markup [cite:859636]
This is the first major revision of North American Vespinae and Vespinae systematics in general. This review provides keys to the North American species as well as provides extensive distributional data and biological notes. Additions and corrections to this publication contaning distributional, biological, and nomenclatiorial information was added in two subsequent publications (1935 and 1941). Links are provided to those below.

Additionally provided below is Bequaert's divisions of the Vespinae which is a prequel to this review and deals with all known species of the Vespinae worldwide that were known at the time.

Here is a link to a readable/downloadable copy: http://www.academia.edu/1463491/Bequaert_1932_A_tentative_synopsis_of_the_hornets_and_yellowjackets_of_america_Hymenoptera_Vespinae_

Related works can be found here:

Bequaert (1930) On the generic and subgeneric divisions of the Vespinae: http://www.academia.edu/1463490/Bequaert_1930_On_the_generic_and_subgeneric_divisions_of_the_Vespinae_Hymenoptera_

Bequaert (1935) Additions and corrections to the revision of North American Vespinae (Entomologica Americana (1932): http://www.academia.edu/1463494/Bequaert_1935_Additions_and_corrections_to_the_revision_of_North_American_Vespinae_Entomologica_Americana_1932_

Bequaert (1941) Additions and corrections to the revision of North American Vespinae (Entomologica Americana (1932) Second paper: http://www.academia.edu/1463499/Bequaert_1941a_Addition_and_corrections_to_the_revision_of_North_American_Vespinae_Entomologica_Americana_1932_Second_paper