Index to Host Plants. 



251 



Phsenogams 152 



Phaseolus diversifolius 162 



helvolus 162 



vulgaris 162 



Phlox pilosa 235 



divaricata 192 



Phragmites communis 199 



Physalis viscosa 235 



Pinus 212 



Pistacea 159 



Plantago Virginica 233 



Podophyllum peltatum 173 



Polemonium reptans 235 



Polygonum acre ... 194 



aviculare, var. erectum 164 



amphibium 194 



Pennsylvanicum 194 



ramosissimum 164 



Virginianum 194 



Pomese 210, 239 



Populus monilifera 214 



tremuloides 214 



Potentilla 204 



Canadensis 205 



Proserpinaca palustris 179 



Prunus Americana 177, 178 



serotina 177, 178 



Virginiana 177 



Psoralea floribunda 226 



Onobrychis 225 



Ptelea trifoliata 225 



Pycnanthemum lanceolatum.. 190 



linifolium 190 



pilosum 190 



Pyrus coronaria 240 



Ranunculus abort! vus 222 



repens 173 



Red cedar 145, 154 



Rhus 159 



toxicodendron 158 



Ribes rotundi folium 227 



Rosa 204, 207 



Rosacese 204 



Rose 206 



Rubus 204 



occidentals 220, 221 



Rubus (continued, ) 



strigosus 207 



villosus 178, 208, 220, 221 



Rudbeckia laciniata 163 



Ruellia ciliosa 189 



strepens 189 



Rye -200 



Sambucus canadensis 228 



Salix 214 



cordata 214 



longifolia 214 



Scirpus atrovirens 197 



fluviatilis 169 



validus 196 



Sedges 154 



Senecio 215 



Seymeria macrophylla 189 



Sida spinosa 175 



Silphium 231 



integrifolium 184, 217, 231 



laciniatum 231 



perfoliatum 184 



terebinthinaceum 184, 217, 231 



Smilacina 239 



racemosa 239 



stellata 239 



Smilax herbacea 238 



hispida 195 



Solidago 217, 230 



altissima 216, 230 



csesia 230 



Canadensis 216 



gigantea 217 



latifolia 216, 230 



rigida.. 230 



ulmifolia 216 



Sonchus arvensis 216 



Spartina cynosuroides 169, 199 



Sparganium eurycarpum 167 



Sunflower 151 



Taraxacum 187 



dens-leonis 187 



Tephrosia Virginiaua 209 



Tricuspis seslerioides 201 



Trillium recur vatum 238 



Urtica 238 



