178 INDEX. 



Page 



Percina 30, 33, 94, 156 



Percopsis 28, 29, 30, 33, 34, 35, 36, 155 



Phegopterus 114 



Philhydrus 83 



Philonthus 84 



Photinus 92 



Photuris 92 



Phyllobrotica 101 



Physa • .118, 132, 133, 134, 135, 138 



Physocnemum 97 



Phytolacca 114 



Phytonomus 105 



Picea . . . . 114 



Pimephales 14, 21, 22. 30, 33, 146, 154 



Pincodera . ..... 77 



Pinus 114 



Pisenus . 104 



Pissodes 106 



Pityobius . 91 



Placobdella lis, 126, 132, 137 



Planorbis 118, 133, 134 



Plathemis 117, 134 



Platycerus .... 94 



Platyderma 103 



Platynus 75, 76, 77 



Platypeltis 63 



Poecilonota 91 



Polygonum [ 115 



Populus 114 



Potentilla 116 



Potomogetoii 14, 16, is, 20, 27, 28, 29, 115 



Prionocyphon 88 



Prionus 97 



Prunus : 114 



Pseudomus 107 



Psnocerus .... 99 



Psyllobora 86 



Pterostichus 73, 74 



ptiiinui : . . ; ; 93 



Purpurescens 97 



Pygosteus 14, 23, 149 



Q. 



Quercus 114 



R. 



Rana . ' 14,62,118 



Rhantus 81 



Rhinichthys 16, 17, 18, 19, 20, 33. 147, 148 



Rivularia 115 



Roccus . 156 



Rubus 114 



S. 



Sagittaria 115, 137 



Salix 114 



Salmo 143, 154 



Salplngiis 104 



Salvelinus 23, 33, 143 



Saperda 99 



Saprinus 87 



Sarracenia 115 



Scarltes . 73 



Scirpus 31, 32, 115 



Scutellaria 114 



Semotilus 16, 17, 18, 19, 20, 33, 146 



Serica : 95 



Sericosmus 91 



Serropalpus 104 



Sialis 117 



Silpha 84 



Simcroiivx 106 



Solenophorus 79, 80 



Somatochlora . 117,126,132.133,134,135 



Sparganium 16, 18, 20, 24, 1 15 



Sphaerium 118, 133 



Sphagnum •. 115, 116 



Sphehophorus 108 



Spirogyra 21, 115 



Spongilla 14, 17, 118, 126, 132, 133, 137 



Staphylinus 84 



Stenolophus 79 



Stentor 118. 126 



