INDEX TO VOLUME XVI. 



Academy of Science, Ohio, 109. 



Africa, South, Homoptera, 161. 



Agallia, 180. 



American Chemist and War's Prob- 

 lems, 219. 



Apple Trees, starch, 356. 



Athj^sanus, 187. 



Anatomy, Jassoidea, 299. 



Biemiller's Cove, sunfish nests, 125. 



Boundary, Ordovician — Silurian, 329. 



Bromides, spectra, 118. 



Carbonaceous material in Monroe for- 

 mation, 155. 



Caryomyia, 43. 



Cave, Reames, 209. 



Cecidiomyia, 37, 43, 269. 



Cedar Point marsh, evaporation, 91. 



Cedar Point, Toledo, 216. 



Celtis occidentalis, zoocecidia, 249. 



Cephalelus, 184. 



Chemist, American, 219. 



Chlorides, spectra, 117. 



Cicadula, 195. 



Constitution, Ohio vState Univ. Sci. 

 Soc, 32. 



Cordia, 173. 



Debarya, 18. 



Deltocephalus, 186. 



Derived solutions, diflferential equa- 

 tions, 231. 



Diagrams, floral, 360. 



Differential equations, derived soki- 

 tions, 231. 



Dipterous galls, 268. 



Electrical behavior, porcelain and glass, 

 81. 



Electrical conductivity, indium and 

 thallium, 244. 



Empoasca, 197. 



Epibranchial placodes, 336. 



Equations, differential, 231. 



Eriophyes, 43. 



Eriophves on Celtis, 256. 



Eriophyidae, 37, 256. 



Evaporation and Plant Zones, 91. 



Exhibit cases, 105. 



Floral diagrams, 360. 



Galls, insect, 37, 249. 



Geometry, translated normal curve, 60. 



Glass, electrical behavior, 81. 



Greenfield member, Monroe formation, 

 155. 



Halogen compounds, spectra, 113. 



Hemipterous galls, 259. 



Hexagon notation, 135. 



Hicoria, Zoocecidia, 37. 



Homoptera of South Africa, 161. 

 Homopterous studies, 161, 299. 

 Idiocerus, 180. 



Indium, electrical conductivity, 244. 

 Introductory, 1. 

 Insect galls, 37, 249. 

 Iodides, spectra, 116. 

 Itonididae, 37, 268. 

 Jassoidea, 161. 

 Jassoidea of Missouri, 3.54. 

 Jassoidea of Missouri, list, 71. 

 Jassoidea, Morphology, 299. 

 Leafhoppers, 161. 

 Leptostyla costofasciata, 326. 

 Locris, 170. 

 Macropsis, 178. 



Making photographic objective, 3. 

 Maxville limestone, outliers, 151. 

 Missouri, Jassoidea, 71, 247, 354. 

 Mite gall, 37. 



Monroe formation, carbonaceous ma- 

 terial, 155. 

 Morphology, Jassoidea, 299. 

 Morphology, Zoocecidia, 249. 

 Nests, sunfish, 125. 

 News and notes, 79, 247. 

 Normal curve, translated, 60. 

 Notes on Zygnemales, 17. 

 Nutrients, renewal in sand cultures, 101. 

 Objectives, photographic, 3. 

 Ohio Acad, of Science, 109. 

 Ohio Maxville limestone, 151. 

 Ohio State University Sci. Soc, 32. 

 Ohio va.scular plants, additions, 104. 

 Ordovician — Silurian boundary, 329. 

 Outliers, Maxville limestone, 151. 

 Pachypsylla on Celtis, 260. 

 Pediopsis, 179. 

 Penthimia, 182. 

 Philaenus, 175. 

 Photographic objective, 3. 

 Phytophaga, 271. 

 Placodes, epibranchial, 322. 

 Plant disease exhibit cases, 105. 

 Plants, Ohio, 104. 



Plant zones, in Cedar Point marsh, 91. 

 Poophilus, 176. 



Porcelain, electrical behavior, 81. 

 Reames cave, 209. 

 Rhinaulax, 169. 



Sand culture, renewal of nutrients, 101. 

 Silurian-Ordovician, boundary, 333. 

 South Africa, Homoptera, 161. 

 Spectra, halogen compounds, 113. 

 Sphaerometer for short radii, 15. 

 Spirogyra, 23. 



365 



