VI 



PAGE 



Therevidffi 334 



Mydaidse 336 



Asilidae 337 



Cyrtidae 341 



Phytophagous and other Cyclorrhapha 342-352 



Syrphidse 342 



Ephydridse 345 



Drosophilid£e 346 



Agromyzidse 348 



Descriptions of new Illinois Diptera 352-363 



Phoridee 353 



Anthomyiida^ 356 



Geomyzidse 357 



Agromyzidae 359 



Chloropidae 360 



ARTICLE V. PHYLLOPHAGA HARRIS (LACHNOSTERNA HOPE) : A 

 REVISION OF THE SYNONYMY, AND ONE NEW NAME. BY 



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



Synonymy of the Phyllophaga of the United States and Canada 370 



Alphabetical list of foregoing names 374 



PTtyllophaga fordesi, n. sp 378 



ARTICLE VI. AN EXPERIMENTAL STUDY OF THE EFFECTS OF 

 GAS Y/ASTE UPON PISHES, WITH ESPECIAL REFERENCE 

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



(1 Figure. 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 in 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 40S 



