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BRITISH GALLS 
Papaver Rhaeas, 103, 187 
,, somniferum, 103 
Papaveraceae, 187 
Paris Daisy, crown-gall on, 123 
Parsnip, 223 
“ Parthenogenesis” (definitionof), 30 
Pazlavsky, 29 
Pea galls ” on oak leaves, 37-39 
Peach, 122 
Pear Midge, 75 
,, Tree, 205, 206 
Pear-leaf Blister mite, 105 
Pearl wort, 184 
Pedicularis sylvatica, 233 
Pemphigus affinis, 87, 155 
,, bursarius, 87, 155 
,, filaginis, 242 
,, pallidus, 177, 178 
,, spirothecae, 87, 155 
,, ulmi, 177 
Pennycress, 193 
Pepperwort, Common, 193 
„ Whitlow, 193 
Peridermium elatinum, 7, 13, 118, 
133 , 134 
,, pmi, 117, 133 
1‘errisia acrophila, 225 
,, affinis, 219 
,, alpina, 183 
,, aparines, 236 
,, capitigena, 214 
,, cardaminis, 188, 189 
,, carpini, 159 
,, cerastii, 183 
,, crataegi, 11, 207 
,, epilobii, 220 
,, filicina, 9, 66, 130 
,, filipendulae, 64 
,, fraxini, 225 
,, galeobdolontis, 230 
,, galii, 11, 67, 68, 234 
„ galiicola, 235 
,, genisticola, 208 
,, glechomae, 65, 229 
,, hyperici, 218, 219 
,, ignorata, 210 
,, Inchbaldiana, 66, 144 
,, inclusa, 137 
,, lathyricola, 214 
,, lotharingiae, 183 
,, loticola, 212 
,, lychnidis, 183 
,, mali, 206 
Perrisia marginem-torquens, 66,143, 
149 
,, muricatae, 139 
,, onobrychidis, 213 
,, papaveris, 187 
,, persicariae, 180 
,, plicatrix, 199-201 
,, pteridicola, 66 
,, pyri, 205 
,, ranunculi, 185, 186 
,, rosarum, 202, 203 
,, serotina, 218 
,, stachydis, 229 
,, terminalis, 66, 143, 144 
,, tiliamvolvens, 217 
,, trachelii, 241 
,, trifolii, 211, 212 
,, tubicola, 209 
,, ulmariae, 63, 64, 198, 199 
,, urticae, 9, 65, 179 
,, veronicae, II, 64, 65, 232 
,, viciae, 213, 214 
,, violae, 219, 220 
Peucedanum sativum, 223 
Peyritsch on experimental galls, 6, 
90, 102, 103 
Phalonia atricapitana, 55, 245 
Phleum pratense, 112 
Phloe<>des tetraquetrana, 155, 157 
Phorbia brassicae, 75, 191, 192 
,, seneciella, 246 
Phorodon galeopsidis, 230 
,, humuli, 196 
Phragmites communis, 137 
Phyllaphis fagi, 176 
Phyllerium, 93 
,, on fossil maple leaves, 
98 
,, rubi, 200 
,, tortulosum, 156, 157 
Phyllocoptes acericola, 94, 97, 215 
,, fraxini, 94, 225, 226 
,, magnirostis, 144 
,, oblongus, 96 
,, pedicularis, 233 
,, populi, 154 
Physoderma heleocharidis, 139 
Phytoptus aceris, 215 
„ ajugae, 230 
,, coryli, 160 
,, crataegi, 207 
,, fraxini, 226 
,, galii, 236 
