Page:Descent of Man 1875.djvu/684

668

* Peregrine falcon, new mate found by, 408.
 * Period of variability, relation of, to sexual selection, 240.
 * Periodicity, vital, Dr. Laycock, on, 8.
 * Periods, lunar, followed by functions in man and animals, 8, 164.
 * of life, inheritance at corresponding, 228, 232,
 * Perisoreus canadensis, young of, 481.
 * Peritrichia, difference of colour in the sexes of a species of, 294.
 * Periwinkle, 262.
 * Pernis cristata, 424.
 * Perrier, M., on sexual selection, 210; on bees, 292.
 * Perseverance, a characteristic of man, 564.
 * Persians, said to be improved by intermixture with Georgians and Circassians, 586.
 * Personnat, M., on Bombyx Yamamai, 251.
 * Peruvians, civilisation of the, not foreign, 145.
 * Petrels, colours of, 493.
 * Petrocincla cyanea, young of, 487.
 * Petrocossyphus, 461.
 * Petronia, 483.
 * Pfeiffer Ida, on Javan ideas of beauty, 580.
 * Phacochœrus œthiopicus, tusks and pads of, 519.
 * Phalanger, Vulpine, black varieties of the, 539.
 * Phalaropus fulicarius, 476.
 * hyperboreus, 476.
 * Phanœus, 298.
 * carnifex, variation of the horns of the male, 297.
 * faunus, sexual differences of, 296.
 * lancifer, 295.
 * Phaseolarctus cinereus, taste for rum and tobacco, 7.
 * Phasgonura viridissima, stridulation of, 284, 285.
 * Phasianus Sœmmerringii, 446.
 * versicolor, 396.
 * Wallichii, 400, 472.
 * Pheasant, polygamous, 219; and black grouse, hybrids of, 414; production of hybrids with the common fowl, 420; immature plumage of the, 466.
 * Pheasant, Amherst, display of, 396.
 * , Argus, 334, 462; display of plumage by the male, 398; ocellated spots of the 428, 434; gradation of characters in the, 434.
 * , Blood-, 364.
 * , Cheer, 400, 472.
 * , Eared, 235, 400, 472; length of the tail in the, 452; sexes alike in the, 460.
 * , Golden, display of plumage by the male, 396; age of mature plumage in the, 483; sex of young, ascertained by pulling out head-feathers, 484.
 * , Kalij, drumming of the male, 375.
 * , Reeve's, length of the tail in, 452.
 * , Silver, triumphant male, deposed on account of spoiled plumage, 419; sexual coloration of the, 492.
 * , Sœmmerring's, 445, 452.
 * , Tragopan, 383; display of plumage by the male, 397; markings of the sexes of the, 428.
 * Pheasants, period of acquisition of male characters in the family of the, 235; proportion of sexes in chicks of, 247; length of the tail in, 445, 451, 452.
 * Philters, worn by women, 577.
 * Phoca grœnlandica, sexual difference in the coloration of, 535.
 * Phœnicura ruticilla, 408.
 * Phosphorescence of insects, 277.
 * Phryganidæ, copulation of distinct species of, 275.
 * Phryniscus nigricans, 349.
 * Physical inferiority, supposed, of man, 64.
 * Pickering, on the number of species of man, 174.
 * Picton, J. A., on the soul of man, 613.
 * Picus auratus, 362.
 * major, 402.
 * Pieris, 312, 319.
 * Pigeon, female, deserting a weakened mate, 214; carrier, late development of the wattle in, 238; pouter, late development of the crop in, 238; domestic, breeds and sub-breeds of, 460.
 * Pigeons, nestling, fed by the secretion