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A Monograph of the North American Proctotrypidea

William Harris Ashmead

出版	U.S. Government Printing Office, 1893
URL	http://books.google.com.hk/books?id=m6QKAAAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

The author has attempted to provide a systematic description of the species of the Hymenopterous family Proctotrypidae found in North America, north of Mexico, while systematizing and describing the genera of the world, as an aid to future students.