A classification of the larvae and puparia of the Syrphidae of Illinois, exclusive of aquatic forms
By: With seventeen plates.  By Elizabeth M. Heiss
Series: Illinois biological monographs -- v. 16, no. 4
Publisher: The University of Illinois press
Published: 1938
Place of publication: Urbana
Language: eng
Number of pages: 142
Notes: "Contribution from the Entomological laboratory of the University of Illinois.  no. 187."

Descriptive letterpress on versos facing the plates.

On cover:  University of Illinois bulletin.  vol. XXXVI, no. 1.  August 30, 1938.

Issued also as thesis (PH.D.) University of Illinois.

Bibliography:  p. 101-104.