Page:Darwinism by Alfred Wallace 1889.djvu/504

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Mr. J.G., on rarity of spiny plants in Mauritius, 432

Ball, Mr., on cause of late appearance of exogens, 400

Barber, Mrs., on variable colouring of pupae of Papilio nireus, 197

on protective colours of African sun-birds, 200

Barbs, 91

Barriers, importance of, in questions of distribution, 341

Bates, Mr. H.W., on varieties of butterflies, 44

on inedibility of Heliconidæ, 234

on a conspicuous caterpillar, 236

on mimicry, 240, 243, 249

Bathmism or growth-force, Cope on, 421

Beddard, Mr. F.E., variations of earthworms, 67

on plumes of bird of paradise, 292

Beech trees, aggressive in Denmark, 21

Beetle and wasp (figs.), 259

Beetle, fossil in coal measures of Silesia, 404

Beginnings of important organs, 128

Belt, Mr., on leaf-like locust, 203

on birds avoiding Heliconidæ 234

Belt's frog, 266

Birds, rate of increase of, 25

how destroyed, 26

variation among, 49

variation of markings of, 52

variation of wings and tails of, 53

diagram showing variation of tarsus and toes, 60

use of structural peculiarities of, 135

eggs, coloration of, 212

recognition marks of, 222

and butterflies, white in tropical islands, 230

sometimes seize inedible butterflies, 255

mimicry among, 263

Birds, sexual coloration of, 275

cause of dull colour of female, 277

choice of female not known to be determined by colour, etc., 285

decorative plumage of, 285

antics of unornamented, 287

which fertilise flowers, 319

colours of, not dependent on the colours of flowers, 336

no proof of aesthetic tastes in, 336

dispersal of, 355

and insects at sea, 357

of oceanic islands, 358

carrying seeds on their feet, 361

ancestral forms of, 407

Birthplace, probable, of man, 459

Bombyx regia, protective form of larva of, 210

Boyd Dawkins, on development of deer's horns, 389

on origin of man, 456

Brady, Mr. George, on protective colouring of starfishes, 209

Brain development, progressive, 390

Brains of man and apes, 452

Branner, Mr. J.C., on supposed proofs of glaciation in Brazil, 370

Brazil, supposed proof of glaciation in, 370

Brewer, Professor W.H., on want of symmetry in colours of animals, 217

Bromelia, animals inhabiting leaves of, 118

Bronn, Professor, on supposed uselessness of variations of ears and tails, 136

Butler, Mr. A.G., on inedibility of conspicuous caterpillars, 237

Butterflies, varieties of, 44

small, of Isle of Man, 106

special protective colouring of, 206

recognition by, 226

inedibility of some, 234

mimicry among, 240, 249

colour development of, 274

sexual coloration of, 271