... The North American bees of the genus Osmia (Hymenoptera:  Apoidea)
By: by Grace A. Sandhouse.
Series: Memoirs of the Entomological society of Washington.  No.
Publisher: The Entomological society of Washington
Published: 1939
Place of publication: Washington, D.C
Language: eng
Number of pages: 167
Subjects: Bees -- North America.
Notes: Descriptive letterpress on versos of plates.