militaris 90 



Serville, cited 12 



sewage - -■ 25 



Sexual characters, secondary.. 61, 66 



Sharp, cited 37, 62, 68 



Sim, W., cited 69 



Simarubaceae - ^■_- :,;. ii 



Siphonophora avenae 40, 43, 55, bb, b / 



Skinner, Henry, cited - 73 



Smilacaceae - ^^^ 



'"^r'"^''^.::::::::::'28o,-293:294 



foLndifolia 275 278 280 



Smith, J. B., cited 18, 22, 48, 49, 57 68 



Smith, J. Warren, cited -^ /5b 



Snow, W. A., cited -- 12, 80 



Soil, Sugar Grove... ft^ 



Soil activity, Sugar Grove ^96 



Soil wash ^^i. 



Solanaceae '^^'j' 



Solenaspis hyalinus V- 



Solidago juncea - ^^J 



nemoralis -- ^ 



nemorosa - ^ 



patula ^^^ 



Somula -^^ 



Sonchus 39' ^^ 



Sparganiaceae J"° 



Specularia perfohata -»^ 



Spermatophyta 



Sphaerophoria cylindrica ---^ 



28, 43, 50, 59, 67, 88 



flavicauda 67 



nigricauda °° 



Sphecomyia 1^ 



vittata - ll 



Sphegina 15, 67, 88 



campanulata °9 



keeniana ^9 



lobata °9 



rufiventris °" 



Sphenomonas ^"6 



spiders ^6 



Spilomyia 39 



fusca 37, 97 



hamifera 97 



longicornis 97 



quadrifasciata 97 



Spiracles of larvae 17, 19, 20, 22, 71 



spurious vein 31, 32 



Staphyleaceae 324 



St. Fargeau, cited 12 



Strobilophyta 308 



Sugar Grove Region, Botanical 



Survey of 248 



sycamore 45, 58, 66 



Syndesmon thalictroides 275 



Synopsis of N. A. Syrphidae 12 



Syritta pipiens 15, 72, 94 



Syrphidae of Ohio 1 



Syrphidae, Bibliography of 99 



Key to Genera of 74 



Plates 101-123 



Syrphinae 14, 15, 35 



Syrphini 14 



Syrphus 12, 15, 22, 28, 39, 55, 66 



americanus 16, 24, 26, 



30, 43, 44, 45, 50, 51, 55, 56, 86 



arcuatu^i 86 



diversipes 86 



grossulariae 15, 86 



perplexus 86 



protritus 86 



ribesii 15, 86 



torvus 15, 18, 50, 57, 86 



xanthostomus 40, 42, 57, 86 



swarming 35 



Systematic Position of Syrphidae 13 



Taxaceae 308 



Taxus - 266 



Temnostoma alternans 37, 98 



bombylans 98 



excentrica 98 



pictula 98 



trifasciata 98 



venusta 98 



Temperature, Sugar Grove 255 



termites 25, 40, 6;^ 



Tertiary beds, American 15 



Teuchccnemis lituratus 93 



Thalictrum dioicum 275 



The Euglenoidina of Ohio 343 



Index 447 



thistle 5-^ 



Thymelaceae 324 



Tiarella cordifolia 275, 293 



Tilia 266 



Tiliaceae 318 



Titythymalopsis coroUata 281, 294 



Townshend, C. H. T., cited 12, 64 



Toxomerus 87 



tracheae 17, 28 



Trachelomonas 385 



Trillium grandiflorum 275, 294 



Triodonta 33 



curvipes 93 



Tropidia 70 



calcarata 92 



mamillata 92 



quadrata 92 



Tropidoscyphus 418 



Tsuga 266 



canadensis 273, 283 



Typhaceae 308 



458 



