VI 



PAGE 



Therevidae ^^^ 



Mydaidff ^^^ 



Asilidae ^^^ 



Cyrtidae ^*^ 



Phytophagous and other Cyclorrhapha 342-352 



Syrphida' ^^^ 



Ephydrid;r ^*^ 



Drosophllida^ ^^^ 



Agromyzidae - • • ^'*° 



Descriptions of new Illinois Diptera 352-363 



Phorids? ^^^ 



Anthomyiida:" ^^^ 



Geomyzida? ^^ ' 



Agromj'zidae ^^^ 



Chloropida? 360 



ARTICLE V. PHYLLOPHAGA HAKIllS ( LACHNOSTERNA HOPE) : A 

 REVISION OF THE SYNONYMY, AND ONE NEW NAME. BY 



ROBERT D. GLASGOW, Ph.D. Febuuaky, 1916 365-377 



Synonymy of the Phyllophaga of the United States and Canada 370 



Alphabetical list of foregoing names 374 



P7> >il1o])hapa forhe.Hl. n. sp 378 



ARTICLE VI. AN EXPERIMENTAL STUDY OF THE EFFECTS OF 

 GAS WASTE UPON FISHES, WITH ESPECIAL REFERENCE 

 TO STREAM POLLUTION. BY VICTOR E. SHELFORD. Ph.D. 



(1 PiGiTKK. 4 Charts) March, 1917 381-412 



I. Introduction 381 



II. Statement of the fish and gas-waste problem 381 



III. Material and methods 383-388 



1. The character of University of Illinois water 383 



2. Treatment for keeping fishes alive 384 



3. Difficulties to be guarded against ivi fish experiments.... 385 



4. Fishes used , 387 



IV. Gas waste — its character and constituents. 388 



V. Toxicity of waste 389-394 



1. Methods of experimenting 390 



2. Toxicity of waste and tar 391 



3. Toxicity of illuminating gas and constituent gas-mixtures. "392 



4. Reactions of fishes to waste ! 392 



VI. The toxicity of illuminating gas waste constituents 394 



VII. General discussion , 406 



1 . Toxicity and size 406 



2. Toxicity and species 408 



