484 
INDEX 
Heliconidss, not attacked by birds, 57 
sometimes mimicked by other 
Heliconidse, 61 
Heliconimse and Acraeinee, local re- 
semblances of, 383 
Helladotherium, 165 
Hemiptera, protected by bad odour, 
52 
Herbert, Rev. W., on song of birds, 
105 
Herring-gull, change of nesting habits 
in, 115 
Hesthesis, Longicorns resembling ants, 
69 
Hipparion, 164 
Hippotherium, 164 
Hispidse, imitated by Longicorns, 65 
Holothuridae, 136 
Homalocranium semicinctum, 72 
Hooker, Sir J., on flowers of Auckland 
isles, 408 
Hornbills, 298 
Horns of beetles, probable use of, 372 
Houses of American and Malay races 
contrasted, 100 
Howling monkeys, 307 
Humming-birds, number of, 312, 319 
distinctness of, 312, 316 
structure of, 313 
colours and ornaments of, 314 
descriptive names of, 316 
motions and habits of, 316 
display of ornaments by males, 320 
food of, 320 
nests of, 322 
geographical distribution and vari- 
ation of, 322 
of Juan Fernandez, 324 
influenced by varied conditions 
in South America, 329 
relations and affinities of, 330 
sternum of, 332 
eggs of, 333 
feather-tracts of, 333 
resemblance of swifts to, 333 
nestlings of, 334 
differences from sun-birds, 334 
Huxley, Professor, on “ Physical Basis 
of Life,” 207 
on volition, 212 
Hyaenietis, 165 
Hybernia, wintry colours of this 
genus, 45 
Icteeid.®, sexual colouring and nidi- 
fication of, 127 
Ichthyopterygia, 164 
Iguanas, 303 
Imitation, the effects of, in man’s 
works, 99 
Increase, checks to, studied by 
Darwin, 458 
Indians, how they travel through 
trackless forests, 95 
Insects, protective colouring of, 41 
mimicking species of other orders, 
68 
senses of, perhaps different from 
ours, 92 
wingless, 290 
general observations on tropical, 
291 
Instinct, how it may be best studied, 
91 
definition of, 93 
in many cases assumed without 
proof, 94 
if possessed by man, 94 
supposed, of Indians, 95 
supposed to be shown in the 
construction of birds' nests, 98 
Intellect of savages compared with 
that of animals, 192 
Intellectual power, range of, in man, 
191 
Interference colours in animals, 358 
Islands, influence of locality on colour 
in, 384 
Ithomia, mimicked by Leptalis, 59 
I. ilerdina, mimicked by four 
groups of Lepidoptera, 60 
Jacamars, 297 
Jamaica swift altering position of 
nest, 116 
Jeitteles, Professor, on various forms 
of nests of Hirundo urbica, 115 
Jerdon, Mr., on incubation by males 
in Turnix, 81 
Juan Fernandez, humming-birds of, 
324 
Kallima iuachis and Kallima para- 
lekta, wonderful resemblance of, to 
leaves, 43-48 
Kerner on the unbidden guests of 
plants, 466 
