ABRAXAS grossulariata, 119. Acanthotritus dorsalis, 94. Accipiter pileatus, 107. ACREIDE, the subjects of mimicry, 85, 86.
Acronycta psi, protective colouring of, 62.
ADAPTATION brought about by gene- ral laws, 276; looks like design, 281.
ÆGERIIDE mimic Hymenoptera, 90.
AGASSIZ, or embryonic character of ancient animals, 301.
Agnia fasciata, mimics another Longicorn, 95.
Agriopis aprilina, protective colour- ing of, 62.
ALCEDINIDE, sexual colouring and
nidification of, 240.
AMADINA, sexual colouring and ni- dification of, 243. AMPELIDE, sexual colouring and nidification of, 243. ANCYLOTHERIUM, 300. ANDRENIDE, 98.
Angræcum sesquipedale, 272; its fertilization by a large moth, 275.
ANIMALS, senses and faculties of,
127; intellect of, compared with that of savages, 341. ANISOCERINE, 92. ANOA, 190.
ANOPLOTIERIUM, 299. ANTURIBIDE, mimicry of, 94; di- morphism in, 155.
Anthrocera filipendulæ, 120. ANTHROPOLOGISTS, wide difference of opinion among, as to origin of human races, 304; conflict- ing views of, harmonized, 321. ANTIQUITY of man, 303, 322. APATIUS, 98.
APPARENT exceptions to law of co-
lour and nidification, 253. AQUATIC birds, why abundant, 32. Araschnia prorsa, 154. ARCHEGOSAURUS, 300.
ARCHEOPTERYX, 300.
ARCHITECTURE of most nations de- rivative, 228; Grecian, false in principle, 226.
ARCTIC animals, white colour of, 50, 51.
ARGYLL, Duke of, on colours of Woodcock, 53; on mind in na- ture, 265; criticism on Darwin's 'works, 269; on humming birds 282; on creation by birth, 287. ASILUS, 97.
ASPECTS of nature as influencing man's development, 317.
BABIRUSA, 196. BALANCE in nature, 42. BARRINGTON, Hon. Daines, on song of birds, 220.
BASILORNIS, 196. BATES, Mr., first adopted the word "mimicry," 75; his observations on Leptalis and Heliconidæ, 82; his paper explaining the theory of mimicry, 83; objections to his theory, 108; on variation, 165; on recent immigration of Amazonian Indians, 214. BAYMA, Mr., on "Molecular Me- chanics," 363, 364.
BEAUTY in nature, 282; not uni-
versal, 284; of flowers useful to them, 285; not given for its own sake, 285.
BIRDS, possible rapid increase of, 29; numbers that die annually, 30; mimicry among, 103; dull colour of females, 114; nidi- fication as affecting colour of females, 116; refusing the gooseberry caterpillar, 119; the highest in rank and organiza- tion, 137; dimorphism in, 155; why peculiar nest built by each species, 215-219; build more per- fect nests as they grow older, 224, 227; alter and improve their nests, 226; sexual differ- ences of colour in, 239. Bombus hortorum, 90. Bombycilla garrula, colours and nidification of, 255. BOMBYLIUS, 98.
BRAIN of the savage but slightly less than that of civilized man, 336; size of, an important ele- ment of mental power, 335; of Savage races larger than their needs require, 338, 343; of man
and of anthropoid apes com- pared, 338.
BROCA, Professor Paul, on the fine
crania of the cave men, 337. Bryophila glandifera and B. perla protectively coloured, 63. BUCEROTIDE, sexual colouring and nidification of, 241. BUCCONIDE, sexual colouring and nidification of, 241.
BUFF-TIP moth, resembles a broken stick, 62.
BUILDINGS of various races do not change, 213.
BUPRESTIDE, resembling bird's dung, 57; similar colours in two sexes, 114. BUTTERFLIES, value of, in studying
"natural selection," 131; varie- ties of, in Sardinia and Isle of Man, 178.
CACIA anthi ibrides, 94. Callizona ucesta, protective colour- ing of, 59. CALORNIS, 239.
CAPITONIDE, sexual colouring and nidification of, 241. Capnolymma stygium, 94. CARABIDE, special protection among, 72; similar colouring of two sexes, 114. CASSIDE, resemble dew drops, 58. CATERPILLARS, mimicking a poi-
sonous snake, 99; gaudy co- lours of, 117; various modes of protection of, 118; gooseberry caterpillar, 119; Mr. Jenner Weir's observations on, 119; Mr. A. G. Butler's observations on, 121.
CELEBES, local modifications of form in, 170; probable cause of these, 176; remarkable zoolo- gical peculiarities of, 195-199. CENTROPUS, sexual colouring and nidification of, 242. Cephalodonta spinipes, 92. Ceroxylus laceratus, imitates a moss covered stick, 64. CARTHIOLA, Sexual colouring and nidification of, 244. Cethosia cole, 172; biblis, 172. CETONIADE, how protected, 73; similar colours of two sexes, 114.
Charis melipona, 96. CHEMATOBIA, wintry colours of this genus, 62.
Chlamys pilula, resembles dung of caterpillars, 58.
CHRYSIDIDE, how protected, 72. CHRYSOMELIDE, similar colouring of two sexes, 114. CICINDELA, adaptive colour of va- rious species of, 57. Cilix compressa, resembles bird's dung, 63.
CLADOBATES, mimicking squirrels, 107.
CLASSIFICATION, form of true, 6;
circular, inadmissible, 8; quina- rian and circular, of Swainson, 46; argument from, against Mr. Darwin, 295.
CLIMACTERIS, sexual colouring and
nidification of, 243. COCCINELLIDE, how protected, 72;
similar colouring of sexes, 114. COEXISTING varieties, 159. Collyrodes lacordairei, 95.
COLOUR, in animals, popular theo- ries of, 47; frequent variations of, in domesticated animals, 48; influenced by need of conceal- ment, 49; in deserts, 49, 50; in Arctic regions, 50, 51; noc- turnal, 51; tropical, 52; special modifications of, 52; different distribution of, in butterflies and moths, 58; of autumnal and winter moths, 62; white, generally dangerous and there- fore eliminated, 66; why it exists so abundantly although often injurious, 69; influenced by need of protection, 113; of female birds, 114; in relation to nidification of birds, 116; gaudy colours of many caterpillars, 117; in nature, general causes of, 126; local variations of, 173; sexual differences of, in birds, 239; in female birds, how connected with their nidifica- tion, 240, 246; more variable than structure or habits, and therefore more easily modified, 249; of flowers, as explained by Mr. Darwin, 262; often corre- lated with disease, 316. COMPSOGNATHUs, 300. Condylodera tricondyloides, 97. CONSCIOUSNESS, origin of, 360;
Professor Tyndall on, 361; not a product of complex organiza- tion, 365.
CORRELATION of growth, 310. Corynomalus sp., 92.
COTINGIDE, sexual colouring and nidification of, 244. CRATOSOMUS, a hard weovil, 94.
CRICKETS mimicking sand wasps, 98.
CRYPTODONTIA, 299. Cucullia verbasci, 120. CURCULIONIDE, often protected by hard covering, 71; similar co- lours of two sexes, 114. Cuviera squamata, 258. Cyclopeplus batesii, 92. CYNOPITHECUS, 196. Cynthia arsinoë, 172.
DANAIDE, the subjects of mimi- cry, 85, 86.
Danais erippus, 88; chrysippus, 112; sobrina, 179; aglaia, 179; tytia, 180.
DARWIN, Mr., his principle of uti- lity, 47; on cause of colour in flowers, 127, 262; on colours of caterpillars, 118; on sexual co- louration, 260; his metaphors liable to misconception, 269; criticism of, in North British Review, 291.
DESERT animals, colours of, 49, 50. DIADEMA, species of, mimic Danai-
dæ, 86, 87: female with male colouration, 112. Diadema misippus, 112; D. ano- mala, 113.
Diaphora mendica, 89. DICNYODONTIA, 299.
DICROURUS, 253.
Diloba cæruleocephala, 120. DIMORPHISM, 145; in beetles, 155; in birds, 155; illustrated, 157.
DIPTERA mimicking wasps and bees, 97.
Deliops curculionides, 94.
DOMESTICATED animals, their essen- tial difference from wild ones, 38-41.
DRUSILLA, mimicked by three ge- nera, 181.
Drusilla bioculata, 180. DYTISCUS, dimorphism in, 155.
EGYPTIAN architecture, intro- duced, 225.
Elaps fulvius, E. corallinus, E. lem- niscatus, 101; E. mipartitus, E. lemniscatus, E. hemiprichii, 102. ENODES, 196.
ENNOMUS, autumnal colours of this genus, 62.
Eos fuscata, dimorphism of, 155. EQUUS, 299.
Eronia tritea, 172; valeria, 172. Eroschema poweri, 93.
ERYCINIDE mimic Heliconidæ, 84. Erythroplatis corallifer, 92. ESTRELDA, sexual colouring and nidification of, 243.
EUCNEMIDE, mimicking a Malaco- derm, 93.
Eudromias morinellus, 251. Euglossa dimidiata, 98. EUMORPHIDE, a protected group,
72; imitated by Longicorns, 92. EUPLCEA, local modifications of co- lour in, 173.
Euploa midamus, 87-113, 179; E. rhadamanthus, 87, 179. Eurhinia megalonice, 172; poly- nice, 172.
EURYLEMIDE, Sexual colouring and nidification of, 243.
EXTINCT animals, intermediate forins of, 298.
EXTINCTION of lower races, 318.
FEMALE birds, colours of, 114;
sometimes connected with their mode of nidification, 240; more exposed to enemies than the males, 248.
FEMALE butterflies generally dull- coloured, 259.
FEMALE insects, mimicry by, 110, 259; colours of, 113. FEMALE sex, has no incapacity for
as brilliant colouration as the male, 247; in some groups re- quires more protection than the male, 258.
FISHES, protective colouring of, 55. FISSIROSTRAL birds, nests of, 238. FLOWERS, causes of colour in, 127. FLYCATCHERS, genera of, absent
from Celebes, 177.
FORBES, EDWARD, objections to his theory of Polarity, 17-23. FORCE is probably all Will-force, 366.
GALAPAGOS, 10.
GALTON, Mr., on range of intellec- tual power, 339. GANOCEPHALA, 298. Gastropacha querci, protective co-
lour and form of, 62.
GAUDRY, M., on fossil mammals of Greece, 299.
GEOGRAPHICAL distribution, de- pendent on geologic changes, 1; its agreement with law of in- troduction of new species, 9; of allied species and groups, 12. GEOLOGICAL distribution analogous to geographical, 13.
GEOLOGY, facts proved by, 2-5. GIRAFFE, how it acquired its long neck, 42.
GLEA, autumnal colours of this genus, 62.
GOULD, Mr., on sexual plumage of Gray Phalarope, 115; on incu- bation by male Dotterell, 115. Grallina australis, 254.
GREEN birds almost confined to the tropics, 52. Gymnocerus cratosomoides, 94. Gymnocerous capucinus, 96. Gymnocerous dulcissimus, 97. GUNTHER, Dr., on arboreal snakes, 55; on colouring of snakes, 102. Gynecia dirce, 59.
HABITS, often persistent when use of them has ceased, 234; of children and savages analogous to those of animals, 235; if persistent and imitative may be termed hereditary, 235, 236. HAIRY Covering of Mammalia, use of, 344; absence of, in man re- markable, 345; the want of it felt by savages, 346; could not have been abolished by natural selection, 348. Harpagus diodon, 107. HEILIPLUS, a hard genus of Cur- culionidæ, 94.
HELICONIDE, the objects of mimi. cry, 77; their secretions, 88; not attacked by birds, 79; some- times mimicked by other Heli- conidæ, 85. HELLADOTHERIUM, 300. HEMIPTERA, protected by bad odour, 72.
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