480 



INDEX 



tion, 64 ; xanthodice, distribution of, 



366 



Pigmental colors, 194 < 



Pigments, of eyes, *no, *m, *ii2, 



*ii3; nature of, 195; of Pieridas, 



196 



Pilifers, *42 

 Pimp I a, 312 

 Pine, insects of, 252 

 Pinguicula, 257 

 Placodeum, *95 

 Planta, '270 

 Plants, insectivorous, 256 ; insects in 



relation to, 252 . 

 Plasma, 127 

 Plasmodium, *3OO, 301 

 Plateau, on color sense, 115; muscu- 

 lar power, 88; respiration, 139; 



416, 423, 427, 429, 432, 435, 459 

 Plat ephemera, *386 

 Plathemis, abdominal appendages of, 



*72 ; antenna, *34 

 Platner, 434 

 Platygaster, hypermetamorphosis of, 



167, ="176 

 Platypsyllus, 278 

 Platyptera, denned, n, *i2 ; origin of, 



23, *25 

 Plecoptera, denned, 13, *i4; nymph, 



*i 62 ; origin, 23, *25 

 Pleistocene insects, 385, 391 

 Pleurites, 48, *49 

 Pleuron, 47 

 Plotnikow, 423 

 Pocock, 412 

 Podical plate, *73 



Podisus, egg of, *i59 ; predaceous, *3O7 

 P&cilocapsus, color changes of, 215 

 Pogonomyrmex, 340 

 Polar bodies, *i46 

 Poletajeff, N., 424 

 Poletajew, O., 435, 445 

 Poletajewa, 432 

 Polistes, behavior of, 360, 365 ; habi's, 



329 ; wing vibration, *64 

 Polites, on Iris, ^267 

 Pollenizers, insect, 266 

 Pollination, 259, 266 ; of Iris, *26o, 



*26i ; milkweed, *262 ; orchids, 262 ; 



Yucca, *264 

 Pollinia, *262 

 Polybia, 328 

 Polyergus, 336 

 Polygoneutic, 204 

 Polygonia, dimorphism of, 202 ; egg, 



*i59 



Polymorphism, 202, 330 

 Polynema, 177 



Polyphemus (see Telea) 



Polyphylla, assembling of, 103 



Polyrhachis, 333 



Pompilus, behavior of, 360, 364 



Porthetria dispar, damage by, 397 ; 

 hermaphroditism, *i44; tracheae, 

 *I38 



Post-gense, 30 



Postscutellum, *48 



Potato beetle (see Leptinotarsa) 



Pouchet, 434, 459 



Poulton, on adaptive coloration, 230, 

 231, 234; on colors of larvae and 

 pupae, 197, 198; 444, 447, 448, 449, 

 450, 45i 



Powell, 444 



Pratt, 444 



Predaceous insects, 276, *3O7 ; in rela- 

 tion to birds, 291 



Premandibular, appendages, *iso; seg- 

 ment, 45 



Primitive insects, 21, 22 



Primitive streak, 148 



Primordial insect, 21 



Prionus, assembling of, 103 ; eggs, 161 



Proboscis, *42 



Procephalic lobes, *i49, *iso, *i52 



Proctodaeum, 117, *i2O, *i49 



Proctotrypidae, 27, 311 



Prodo.vus, 266 



Prodryas, *39O 



Prognathous, n 



Promethea (see Callosamia) 



Pronotum, *48 



Pronuba, *264, *26$ 



Propodeum, 46, 66 



Propolis, 323 



Protective, adaptations, 297 ; mimicry, 

 *224, 233 ; resemblance, *2i6, 220 



Prothorax, 46 



Protocerebrum, 90, 152 



Protoplasm, adaptive, 243 



Proventriculus, 118 



Pseudocone, *ii2 



Pseudomyrma, 273 



Psocidae, *i2 



Pteronarcys, 13, *i4; tracheal gills of, 



135 



Pterygota, 10 



Ptilodactyla, antenna of, *34 

 Pulvillus, 51, *54 

 Punktsubstanz, *93 

 Pupae, 156, 167; emergence of, 171; 



protection, 169 ; respiration, 169 

 Pupal stage, significance of, 177, 183 

 Puparium, 168 



Pupation of a caterpillar, 168 

 Putnam, on habits of Bombus, 328 



