SUBJECT INDEX. 



Academy of Science, Annual Meeting, 

 Ohio, 1. 



Additions to the Catalog of Ohio Vas- 

 cular Plants for 1920, 128. 



Adirondack's, A New Ambrosia Beetle 

 from the, 201. 



Alg:al Food of the Young Gizzard 

 Shad, 113. 



Ambrosia Beetle, A New, 201. 



A New Ambrosia Beetle, 201. 



Annual Meeting of the Ohio Academy 

 of Science: 1. 



Apple Seedlings, Carbohydrate Ma- 

 terial in, 89. 



A Preliminary -General Survey of the 

 Macro-Fauna of Mirror Lake, 137. 



Beetle from the Adirondacks, A New 



Ambrosia, 201. 

 Blastoids, and Cystids of Racine and 



Cedarville, 33. 



Carbohydrate Materials in Fruit Spurs 

 and Apple Seedlings, 89. 



Catalog of Ohio Vascular Plants, 

 1920, 128. 



Citric Acid, Comparative Resistance of 

 Euglenidae to, 267. 



Colonies of Pectinatella, 123. 



Comparative Resistance of Euglenidae 

 to Citric Acid, 267 



Concerning "Larval" Colonies of Pec- 

 tinatella, 123. 



Corythuca celtides, Life History, 104. 



Cj^stids and Blastoids, of Racine and 

 Cedarville, 33. 



Dendroica auduboni. Revision of Races 



of, 240. 

 Dragon-flies, Phylogeny of Zygoter- 



ous, 19. 



Early Stages of Corythuca celtidis, 104. 

 Echmoderms, Notes on, 33. 

 Elachusta, Notes on, 206. 

 Euglenidae, Comparative Resistance 

 of, to Citric Acid, 267. 



Family Miridae, Hemiptera of, 107. 



Figworts of Ohio, 217. 



Food of the Young Gizzard Shad, 113. 



Forms of Oedogonium, New, 272. 



Forty-two Hitherto Unrecognized Gen- 

 era and Subgenera of Zygoptera, 83. 



Fruit Spurs, Carbohydrate Materials 

 in, 89. 



General Survey of the Macro-Fauna of 

 • Mirror Lake", 137. 

 Gizzard Shad, Algal Food of Young, 113 



Hemiptera of the Family Miridae, 107. 



Inflorescences, Sexual State in Certain 

 Monecious, 185. 



"Larval" Colonies of Pectinatella, 123. 



Macro-Fauna of Mirror Lake, 137. 

 Microlepidoptera, Notes on, 206. 

 Mildews, Notes on Powderv of Ohio, 



211. 

 Miridae, Hemiptera of the Family, 101. 

 Mirror Lake, Macro-fauna of, 137. 

 Molding Sand, Steel in Ohio, 272. 

 Monecious Inflorescences, Sexual State 



in, 185. 



New Ambrosia Beetle, 201. 

 New Forms of Oedogonium, 272. 

 Notes on Elachista II (Microlepidoo- 



tera), 206. 

 Notes on the Life Historv of Corythuca 



Celtidis, 104. 

 Notes on the Powdery Mildews of 



Ohio, 211. 

 Notes on the Work of Xyloterius Pol- 



itus, 201. 



Oedogonium, New Forms of, 272. 



Ohio Academy of Science, 30th Meet- 

 ing, 1. 



Ohio, Figworts of, 217. 



Ohio, Powdery Mildews of, 211. 



Ohio State University, Macro-Fauna of 

 Mirror Lake on the, 137. 



Ohio, Steel Molding Sand in, 272. 



Ohio Vascular Plants for 1920, 128. 



Pectinatella, "Larval" Colonies, 123. 



Phylogeny of the Zygo]iterous Dragon- 

 flies, 19. 



Plants', Ohio Vascular for 1920, 128. 



Powdery Mildews of Ohio, 211. 



Preliminary Survey of the Macro- 

 Fauna of Mirror Lake, 137. 



Racine and Cedarville Cystids and 

 Blastoids, 33. 



Report of the 30th Annual Meeting of 

 the Ohio Academy of Science, 1. 



Reversal of the Sexual State in Mone- 

 cious Inflorescences, 185. 



277 



