INDEX 



495 



Phyciodes, coloration of, 178, *i82 



Phylloxera, 350, 410, 416 



Phylogeny, 5, *8, *2$ 



Phytonomus, spread of, 338 



Phytophaga, "19 



Phytophagous, 373 



Pictet, on coloration, 176, 179 



Piepers, 460 



Pierce, 24, 157, 354, 360, 368, 375,-376, 378, 

 434, 463, 466 



Pieris, color sense of, 100; dispersion, 322; 

 fat-cells, *ii3; imaginal buds, *i62; 

 olfactory organs, *QO; scale, *6g; napi: 

 temperature experiments on, 182; pro- 

 todice: sexual coloration of, *i84; 

 rapa: androconium of, *7i; developing 

 wing, *i63; distribution, 338; eggs, 

 *i4o; food plants, 213; hair, *68; larval 

 tissues, *H3; pupal coloration, 177; 

 wing vibration,. 59; xanthodice, distri- 

 bution of, 322 



Pigmental colors, 174 



Pigments, of eyes, *g6, *gj, *gS, *gg; nature 

 of, 175; of Pieridae, 175 



Pilifers, *4o 



Pimpla, 274 



Pine, insects of, 212 



Ping, 476 



Pinguicula, 216 



Pink boll worm (see Pectinophora) . 



Placodeum, *85 



Plague, 260 



Planta, *228 



Plant lice (see Aphididai). 



Plants, diseases of, 218; insectivorous, 216; 

 insects in relation to, 212 



Plasma, no 



Plasmodium, 248 



Plateau, on color sense, 100; muscular 

 power, 79; respiration, 123; 441, 444, 

 446, 449, 468 



Platephemera, *342 



Plathemis, abdominal appendages of, *66; 

 antenna, *32 



Platygaster, hypermetamorphosis of, 146, 

 *i58 



Platypsyllus, 234 



Platyptera, denned, 10; origin of, 22, *25 



Plecoptera, denned, 14, "13; nymph, *i42; 

 origin, 22, *2S 



Pleistocene insects, 341 



Pleurites, *45, *47 



Pleuron, 45 



Plotnikow, 441 



Pocock, 432 



Podical plate, *67 



Podisus, egg of, *i39; predaceous, *27o 



Pcecilocapsus, color changes of, 190 



Pogonomyrmex, 297 



Polar bodies, *i29 



Poletajew, 449, 455 



Poliomyelitis, 269 



Polistes, behavior of, 316, 321; habits, 288; 

 wing vibration, *$8 



Polites, on Iris, *226 



Pollenizers, insect, 225 



Pollination, 219, 225; of Iris, *22o; milk- 

 weed, 221, *222; orchids, 221; Yucca, 



222, *224 



Pollinia, *222 



Polybia, 287 



Polyembryony, 136 



Polyergus, 294 



Polygoneutic, 182 



Polygonia, dimorphism of, 180; egg, *i39 



Polymorphism, 289 



Polyqema, 158 



Polyphagous, 373 



Polyphemus (see Telea). 



Polyphylla, assembling of, 90 



Polyrhachis, 291 



Pomace flies (see Drosophila}. 



Pompilus, behavior of, 316, 319 



Popillia japonica, 418 



Porthetria dispar, damage by, 416; distribu- 

 tion by winds, 368; gynandromor- 

 phism, *i28; tracheoles, *i2i 



Postclypeus, 29 



Postgenae, 29 



Postscutellum, *45, *46 



Potato beetle (see Leptinotarsa). 



Pouchet, 468 



Poulton, on adaptive coloration, 206, 207, 

 209; on colors of larvae and pupae, 177; 

 454, 457, 458, 459, 460, 461 



Powell, 139, 455 



Pratt, 454, 455 



Precipitation, 366 



Predaceous insects, 233, *27o; in relation 

 to birds, 245 



Prell, 434 



Premandibular, appendages, *i3a; segment, 



*43, 44 

 Pressure, 363 



