Part 24

Biology, by-paths of, illustrated, 251

Birds, 99 how many known, 124 cases of local variation of colour among, 262 influence of locality on colours of, 255 which fertilize flowers, 273, 274 and insects blown to oceanic islands, 308 of Palæarctic Region, 316 of Ethiopian Region, 318 of Oriental Region, 320

Bonelli, Mr., on the Sappho comet humming-bird, 132

Bullock on food of humming-birds, 153

Buprestidæ, 94

Burchell, Dr., on the “stone mesembryanthemum,” 223

Butterflies, abundance of, in tropical forests, 72 conspicuousness of in tropical forests, 73 colours and form of, 74 peculiar habits of tropical, 76 tropical and temperate compared as to colour, 164 females do not choose their partners, 200 with gaily-coloured females, 204 numbers and variety of, 255 influence of locality on colours of, 255

Buttressed trees, 31

Calamus, 41

Callithea, imitated by species of Catagramma and Agrias, 257

Callithea markii, 75

Campylopterus hemileucurus, pugnacious and ornamental, 214

Cattleyas, 51

Cecropias, trees inhabited by ants, 89

Celebes, large and peculiarly formed butterflies of, 259 white-marked birds of, 263

Centipedes, 97

Ceylon and Malaya, resemblances of fauna of, 327

Chameleons, 113

Chameleon, cause of changes of its colour, 170

Chemical action changes colours, 183

Chili, humming-birds of, 141

Chiroptera, 119

Chrysobactron Rossii, 238

Clark, Rev. Hamlet on leaf-cutting ants, 86

Climate of Equator, general features of, 17

Climates of Timor, Angola, and Scotland compared, 14

Climbing plants of tropical forests, 37 uses of, 39

Cockatoos, 100