478 



INDEX 



Belt, Mr., on leaf-cutting ants, 283 

 on an Acacia inhabited by ants, 



285 

 on uses of ants to the trees they 



live on, 285 



on a leaf-like locust, 288 

 on tree-frogs, 305 

 on the habits of humming-birds, 



319 

 on uneatable bright-coloured frog, 



351 



on use of light of glow-worm, 374 

 Berthoud, on stone implements in 



tertiary deposits in America, 448 

 Betel-nut, 252 

 Bill of humming-birds, 315 

 Birds, possible rapid increase of, 23 

 numbers that die annually, 24 

 mimicry among, 73 

 dull colour of females, 80 

 nidification as affecting colour of 



females, 81 



refusing the gooseberry cater- 

 pillar, 84 

 why peculiar nest built by each 



species, 101, 103 

 build more perfect nests as they 



grow older, 108 



on instincts of newly-hatched, 109 

 alter and improve their nests, 114 

 sexual differences of colour in, 123 

 tropical orders of, 292 

 how many known, 312 

 influence of locality on colours 



of, 382 

 cases of local variation of colour 



among, 387 

 Bombus hortorum, 64 

 Bombycilla garrula, colours and 



nidification of, 134 

 Bombylius, 69 

 Bonelli, Mr., on the Sappho comet 



humming-bird, 318 

 Brain of the savage but slightly less 

 than that of civilised man, 188 

 size of, an important element of 



mental power, 188 

 of savage races larger than their 



needs require, 190, 193 

 of man and of anthropoid apes 



compared, 190 

 Broca, Professor Paul, on the fine 

 crania of the cave men, 189 



Bryophila glandifera and B. perla pro- 

 tectively coloured, 46 

 Bucerotidae, sexual colouring and 



nidification of, 125 

 Bucconidae, sexual colouring and 



nidification of, 125 

 Buff -tip moth, resembles a broken 



tick, 45 

 Buildings of various races do not 



change, 99 

 Bullock on food of humming-birds, 



320 



Buprestidae, resembling bird's dung, 

 42 



similar colours in two sexes, 80 

 in tropical forests, 289 

 Burchell, Dr., on the "stone mesem- 



bryanthemum," 396 

 Butterflies, abundance of, in tropical 

 forests, 272 



conspicuousness in tropical forests, 



273 



colours and form of, 273 

 peculiar habits of tropical, 275 

 tropical and temperate compared 



as to colour, 342 

 females do not choose their part- 

 ners, 370 



with gaily coloured females, 373 

 influence of locality on colours of, 



382 

 Buttressed trees, 241 



CACIA anthriboides, 67 



Caelogynes, 257 



Calamus, 249 



Calaveras skull found in auriferous 

 gravel, 447 



California, auriferous gravels of, 442 



Callithea, imitated by species of Cata- 

 gramma and Agrias, 383 



Callithea markii, 274 



Callizona acesta, protective colouring 

 of, 43 



Calornis, 123 



Campylopterus hemileucurus pug- 

 nacious and ornamental, 380 



Capitonidae, sexual colouring and 

 nidification of, 125 



Capnolymma stygium, 67 



Carabidae, special protection among, 

 52 



similar colouring of two sexes, 80 



