336 INDEX 



Page 



Oxalis stricta 48, loi 



Oxj-echus vociferus 237, 273, 274, 282 



P. 



Pallifera dorsalis 143, 144, 14G, 149, 157 



Panax quinquefolium 105 



trifolium 105 



Pandion haliaetus carolinensis 274, 285 



Panicum capillare 76 



depauperat um 76 



latifolium 76 



lindheimeri 76 



meridionale 76 



miliaceum ■ ' 76 



scribnerianum 76 



t suget orum 76 



virgatum 76 



xanthophysum 48, 49, 76 



Panus radus 57, 60 



Passerculus sandwichensis savanna 275, 292 



Passerina cyanea 274, 275, 293 



Pastinacea sativa 105 



Paxillus atrotomentosus 56 



Pectinibranchia 169 



Pelecypoda 171 



Penthestes atricapillus ' 31, 274, 275, 306 



Penthorum sedoides 96, 212 



Perca flavescens 25, 26, 27, 247, 254 



Percina caprodes 25, 26, 27, 247, 254 



Percopsis guttatus 26, 247, 251 



Pedicularis canadensis 112 



Pelidna alpina sakhalina 275, 281 



Peromyscus leucopus noveboracensis 22, 310 



maniciilatus bairdi 22, 268, 310 



Petrochelidon lunifrons 274, 275, 294 



Phalaris arundinacea ■ 77 



Phaseropterinae 227 



Phaseolus vulgaris 209 



Phegopteris dryopteris 72 



polypodioides 31, 72 



Philohela minor 274, 280 



Pliilomycidae : 157 



Philomycus carolinensis 143, 149, 157 



Phleum pratense '. 77, 208, 212 



Pliloethripidae 213 



Phlox divaricata 109 



Phragmites communis 38, 39, 41, 42, 78 



Phryma leptostachya 112 



Phyllothrips aspersus 183, 184, 187, 206, 214 



citricornis 187, 206, 214 



Physa ancillaria 126, 127, 129, 167 



magnalacustris 26, 127, 128, 167, 168 



elliptica 138, 141, 169 



gyrina 130, 131, 137, 138, 141, 168 



hildrethiana 138, 168 



heterostropha 127, 130, 131, 134, 139, 140, 168 



integra 139, 141, 169 



sayii 131, 168 



Physalis heterophylla 46, 111 



Physalis pruinosa Ill 



subglabrata Ill 



Physidae ! 167 



Physiographic conditions 17, 36, 65, 122, 179, 243 



Physocarpus opulifolius 97 



