A generic classification of the Nearctic sawflies (Hymenoptera, Symphyta)
By: by Herbert H. Ross.
Series: Illinois biological monographs -- v. 15, no. 2
Publisher: University of Illinois
Published: 1937
Place of publication: Urbana, Ill
Language: eng
Number of pages: 173
Subjects: Hymenoptera -- North America.; Sawflies.
Other titles: Nearctic sawflies.
Notes: "An elaboration of a thesis submitted for the degree of doctor of philosophy in entomology in the Graduate school of the University of Illinois in 1933"

Descriptive letterpress on versos facing the plates.

Bibliography : p.117-126.