Published monthly by the 



New York State Education Department 



Bui.LEriN 343 



New York State Museum 



John M. Clarke Director 

 Ephraim Porter Felt State Entomologist 



Bulletin 86 

 ENTOMOLOGY 23 



MAY FLIES AND MIDGES OF NEW YORK 



THIRD REPORT ON AQUATIC INSECTS 



A study conducted at the entomologic Held station, Ithaca N. Y. under the direction of 

 EPHRAIM PORTER FELT D.Sc. 



JAMES G. NEEDHAM Ph.D. Professor of biology, Lake Forest College 



KENNETH J. MORTON F.E.S.L. Edinburgh, Scotland 



O. A. JOHANNSEN M.S. Instructor in civil engineering, Cornell University 



PAGE 



Preface 4 



Introduction 7 



Summer Food of the Bullfrog at 



Saranac Inn. J. G. Needh.^m g 



Ephemeridae. J. G. Needham. . 17 

 North American Hydroptilidae. 



K.J, Morton 63 



P.\GE 



Aquatic Nematocerous Diptera 



II. O. A. JOHANNSEN 76 



Explanation to the plates 316 



Legenda to text figures 331 



Plates 1-37 face 332 



Index ZT,z 



