INDEX. 



357 



Pigmentation^ definition of, 139; Elmer 

 on, 162; Beddard on Influence of 

 light on, .230; influence of light 

 on, experiments by Cunningham, 

 230; experiments , hy Poulton on 

 effect of light on, 230, 231. 



Pigment, definition of, 139; law of as- 

 sortment of, 139-142, 145; law of 

 growth force in regard to distribu- 

 tion of , 159-160; Elmer on distri- 

 bution of, 162; Dr. Harrison Allen 

 on. 182; metabolism as factor iu 

 distribution of, 163. 



Pigeons 204, 265 



band-tailed 205 



passenger 205 



Pinicola 153, 236, 296 



enucleator 154, 221 



Pipilo 180, 216, 236, 309 



chlorurus 309 



erythrophthalmus 147, 148, 216 



222, 250, 309 



alleni 251 



aberti 254 



f uscus 309 



crissalis 182, 203 



maculatus 147, 148, 216, 250, 309 



arcticus 251, 262 



megalonyx 251 



mesoleucus 254 



oregonus 251 



Pipit 240, 331 



African 240 



Piranga aestiva 221, 243 



erythromelas 143, 160, 153, 180, 222 



hepatica 163 



ludoviciana 180, 222, 150, 157 



rubra 153. 222 



Pitangus , . ; 285 



derbianus 188 



Platypsaris, exceptions to correlative 

 coloration 157 



Plectrophenax 218, 301 



hyperboreus 152, 302 



nivalis 136, 152, 301 



Plectrophanes 236 



Plover, golden 133 



Plumage changes, explained by Yar- 

 rell, 132, 136; Merriam on, without 

 moult, 134;. in breeding season, 

 136; classification of , 137. 



Polioptila 209 



caerulea 158 



californica 353 



plumbea 187. 335 



Polyborus ,272 



cheri way 272 



lutoaus 27,2 



Poocsetes 303 



Pocecetes 236 



Poulton, criticism of Osborn's evi- 

 dence of the inheritance of ac- 

 quired characters, 47; Osborn's re- 

 ply to Poulton, 48; criticism of 

 Wallace on sexual selection, 84; on 

 £6sthetic taste in birds, 93-95; crit- 

 icized by Morgan, 96-96; on gen- 

 eral principles of color, 137-138: 

 classification of color marks, 194; 

 on effect of light on pigmentation, 

 230-231. 

 Praeger, instance of procryptic colors. 197 



Prairie hens 261 



Preferential mating, Darwin on 81, 82 



Procryptic colors defined, 194, 195 ; 

 Praeger's example of, 197. 



Procyon lotor 210 



Progne 314 



subis 146, 150, 221 



Protonotarla 320 



citrea 221 



Psaltriparus 236, 334 



melanotis 187 



Pseudaposematic colors 194, 199 



Pseudepisematic colors, 194-199 ; Beck- 

 ham on, 199. 



Pseud ogryphus californianus 146 



Pseudohybrids, definition of, 174, 177 



Pseudosematic colors 194, 198 



Pseudozoorubin 138 



PsitacidEe 274 



Ptarmigan 134, 195, 260 



Puffin, tufted 200 



Pyrocephalus rubineus 153, 222 



mexicanus 141, 157, 177, 286 



Pyrrhuloxia 236. 310 



sinuata 154, 181 221 



Quail, valley 258 



Quiscalus 146, 221. 229, 295 



Raptores 266 



Eaven, white- necked 152 



Recognition marks, 193; classification 

 of, 194; Wallace on, 200-201. 



Redpolls 299 



Redstart 330 



American 147 



Regulus 236 



calendula 153 335 



182, 187, 335 



olivacea 143 



