INDEX TO VOLUME XIX. 



Acer rubrum, New Variety of, 235. 

 Acidity of Katmai Volcanic Ash, 224. 

 Additions to Catalog of Ohio Vascular 



Plants, 293. 

 Agelacrinites from the Richmond, 58. 

 Agelacrinites and Streptaster, Edrio- 



asteroidea of the Richmond and 



Maysville ordovician, 59. 

 Alaska, Rain Water of S. W, 230. 

 American Tingidae, 417. 

 Ammonia and Nitrous Nitrogen in 



Rain Water of S. W. Alaska, 230. 

 Annual Meeting, Ohio Academy of 



Science, 301. 

 Ants, Key to and Habits of Wiscon- 

 sin, 279. 

 Are Ten Thousand Smokes Volca- 

 noes? 97. 

 Asclepiadora Viridis in Ohio, 299. 

 Ash, Nitrogen of Katmai Volcanic, 213. 

 Ash, Salt, Iron and Acidity of Katmai 



volcanic, 224. 

 (Asilidae, Diptera) Key to Genus 



Laphria, 143. 

 (Asilidae, Diptera) Notes on Nearctic 



Nusa, 244. 

 Beginning of Revegetation in Katmai 



Valley, 318. 

 Birds of Katmai Region, 475. 

 Branching in Vemonia, Unusual Dich- 



otomous, 487. 

 Catalog of Ohio Vascular Plants, 1918. 



279. 

 Character of the Katmai Eruption, 173. 

 Chicks, Use of in Vitamine Tests, 510. 

 Comparative Transpiration of Tobacco 



and Mullein, 422. 

 Concerning the structure of Agelacri- 

 nites and Streptaster, 59. 

 Content, Nitrogen, of Katmai Ash, 213. 

 Content, Salt and Iron of Katmai Ash, 



224. 

 Dichotomous Branching in Vemonia, 



487. 

 Diecious Condition in Morus and 



Salix, 409. 

 (Diptera, Asilidae), Key to Genus 



Laphria, 143. 

 (Diptera, Asilidae), Notes on Nearctic 



Nusa, 244. 

 Editor's statement, 96. 

 Edrioasteroidea of the Richmond and 



Maysville, 59. 

 Eruption, Character of Katmai, 173. 



Fauna of Rock Bottom Ponds, 427. 

 Ferrous Iron of Katmai Ash, 224, 

 Fossils, Silurian from Ohio, 367. 

 Genus Laphria, Key to Species of, 143. 

 (Glenognatha bulbifera). Taxonomy 



and Habits. 210. 

 Great Hot Mud Flow of 10,000 Smokes, 



117. 

 Habits of Mysmena (Glenognatha) 



bulbifera, 210. 

 Habits of Wisconsin Ants, 279. 

 Iron, Ferrous, in Katmai Ash, 230. 

 Katmai Ash, -Salt, Iron and Acidity, 



224. 

 Katmai, Birds of, 475. 

 Katmai, Nitrogen of Ash, 213. 

 Katmai Valley, Revegetation of, 318. 

 Key to Nearctic Species of Genus 



Laphria, 143. 

 Key to Species of Wisconsin Ants, 279. 

 Ko'diak, Recovery of Vegetation at, 1. 

 Laphria, Key to Species of, 143. 

 Maysville Ordovician, Agelacrinites 



and Streptaster of, 59. 

 Meeting of Ohio Academy of Science, 



301. 

 Morus Alba, Diecious Condition of, 409. 

 Mosses of Several Ohio Counties, 362. 

 Mud Flow of 10,000 Smokes, 117. 

 Mullein, Transpiration of Tobacco and, 



422. 

 Mysmena (Glenognatha) bulbifera, 



Taxonomy and Habits, 210. 

 Nature of Diecious Condition in Morus 



and Salix, 409. 

 Nearctic Nusa, Notes on, 244. 

 New Oedogoniaceae, 240. 

 New Spiders from Ohio, 355. 

 New Varieties of Acer Rubrum, 235. 

 Nitrogen Content of Katmai Volcanic 



Ash, 213. 

 Nitrous Nitrogen of Alaska Rain 



Water, 230. 

 North American Tingidae, 417. 

 Notes on Nearctic Nusa, 244. 

 Oedogoniaceae, New, 240. 

 Ohio Academy of Science, 301. 

 Ohio, Asclepiadora viridis in, 299. 

 Ohio Counties, Mosses of Several, 362. 

 Ohio, New Spiders from, 355. 

 Ohio, Potamogeton vaseyi, 343. 

 Ohio, Silurian Fossils from, 367. 

 Ohio Vascular Plants, 293. 

 On Some N. Amer. Tingidae, 417. 



515 



