On dimorphism in the hymenopterous genus Cynips
Subtitle: with an appendix, containing hints for a new classification of Cynipidae and a list of Cynipidae, including descriptions of several new species, inhabiting the oak-galls of Illinois
By: by Benj. D. Walsh
Publisher: The Society
Published: 1864
Place of publication: Philadelphia
Language: eng
Number of pages: 500
Subjects: Hymenoptera
Notes: Cover-title.

From the Proceedings of the Entomological Society of Philadelphia, March, 1864.

Includes errata slip at end.

Includes bibliographical references.

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