Revision of the Pipiza group of the family Syrphidae (flower-flies) from north of Mexico
By: C. Howard Curran ...
Series: Proceedings of the California academy of sciences. 4th ser.,; vol.xi, no. 16
Published: 1921
Place of publication: [San Francisco
Language: eng
Number of pages: 393
Subjects: Pipiza.; Diptera -- North America.
Notes: Caption title.