Bulletins Ohio Biological Survey 



I. Outline of Biological Survey Plan 



Syrphidae of Ohio by C. L. Metcalf - - - $ .50 



II. Catalog of Ohio Vascular Plants 



by John H. Schaffner .50 



III. Botanical Survey of the Sugar Grove Region 



by R. F. Griggs .50 



IV. The Euglenoidina of Ohio 



byL. B.Walton -----.-.-- .50 



