Index to Volumes IV, T' and VI. 
Galls, Lateral Bud, 141} 
Morphology of Leaf, 140 
Root, 117 
Stem, 143 
of Acarina, 1 1.5, 117 
Aphididae, 118, 121 
Arachnida, 129 
('ecidomyia, 110, 119, 140 
Cynipidae, 119, 120, 141 
Diptera, 130 
Hemiptera, 130 
Hymenoptera, 130 
Lepidoptera, 117 
Psyllidae, 1 18 
Tenthredinidae, 143 
Gelastocoridae, 287 
Genera Insectorum, 148 
Geology and Physiography, 431 
of Clifton Gorge, 7.5 
Glands of Plants, 103, 399 
Gymnospermae, 390 
Hackberry, 21.5 
Haematopota, 231 
Helianthus illinoensis, 214 
Helobiae, 83 
Helizoan, A Xew, 261 
Hemiptera of Ohio, 99, 273 
S. Am., 19.5 
Herbarium. State, .59, 249, 264, 
316, 397, 403, 441 
Heterosporous Pteridophyte, 2.5.5 
Hibernacula of Water Plants, 291 
Hickories, Key to, 269 
Homosporous Pteridophyte, 483 
Hydrofluoric Acid for Marking 
Slides, 272 
Hyperiaceae, 403 
Hypericum, 249 
Hyphantria cunea, 4.53 
Isopoda, Ohio List, 488 
Jacket Layer in Sassafras, 192 
Kentucky, Lower Ordovician, 447 
Key to Alders, .517 
Ashes, 270 
t'atalpas, 496 
Dogwoods, 419 
Elms, 31.5 
Genera of Woodv Plants, 
364 
Hickories. 269 
Hyperiaceae, 404 
Liverworts, 312, .503, .530 
Maples, 297 
Poplars, 271 
Sumacs, 293 
Walnuts, 307 
Woody Plants, 277 
Lactuca saligna, 74 
Ladybird, Asiatic, 49 
Lake Laboratory, 177 
Leaf Expansion, 210 
Leaves, Deciduous, 163 
Limestone, Columbus, 67 
List of Ohio Trees, 4.57 
Liverworts, Correction to Key, .503 
Key to, 312, .503, .530 
Lycopodium porophyllum, 301 
Lygaeus sulcatus, 200 
Mallophaga, Xew, .528 
Mammals, Former Occurrence, 471 
Mammals, Ohio, Xotes on, 550 
Maples, Key to, 297 
Marking Slides, Method for, 272 
Marsilea vestita, 554 
Martynia, 444 
Mat Plants, 26.5 
Megamelas angulatus, 374 
spartani, 375 
Milk-sickness, Cause, 463, 477 
Mole, Prairie, 213 
Mollusca, 449 
Xote on, 462 
Morphology of Philotria, 304 
Mosquitoes, 438 
Mosses, 1.57 
Moth Book, 74 
Mutation, 448 
Myndis fulvus, 46 
radicis, 42 
Myriopod, 161 
Mytilus, Development of Gill, 51 
Xatural History Survey, 471 
Xectaries of Plants, 103 
Xelumbo, Embryo of, 167 
Xematophyta, 388 
Xerthra stygica, 288 
Xotiphila, 64 
Xutating Plants, 214 
Xymphaeaceae, 83 
Ohio Academy of Science, 23, 47 
Ordovician, 5Iapping Lower, 447 
Orthezia solidaginus, 94 
Orthoptera of Ohio, 109 
Paddle Fish, 24 
Pamera tuberculata, 201 
Pangonia, 227 
Paraffin Method, 344 
Peas, Disease of Seed, .507 
Pediculidae, 107 
Philotria, Morphology of, 304 
Phlepsius maculatus, 276 
Phyllccelis atra, 93 
Phyllodinus fuscous, 46 
Koebelei, 44 
Physiography and Geology, 431 
Pinus laracio, 396 
