The fungus gnats of North America, part IV
By: [O.A. Johannsen]
Series: Bulletin / Maine Agricultural Experiment Station -- no.       200
Publisher: Maine Agricultural Experiment Station
Published: 1912
Place of publication: Orono
Language: eng
Number of pages: 146
Subjects: Mycetophilidae; Diptera
Other titles: Mycetophilidae of North America.
Notes: Cover title.

Caption title: The Mycetophilidae of North America. Part IV.

Includes index to parts I-IV.