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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.
DINOSAURIA, 298.
DIPTERA mimicking wasps and
bees, 97.
Doliops curculionides, 91.

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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 tritaa, 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.
EUPLOA, 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
forms 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 attack:d by birds, 79; some-
times mimicked by other Heli-
conidæ, 85.
HELLADOTHERIUM, 300.
HEMIPTERA, protected by bad
odour, 72.

HERBERT, Rev. W., on song of
birds, 221.

HESPERIDE, probable means of
protection of, 176.

HESTHESIS, longicorns resembling
ants, 96.

Hestia leuconoi, 180.
HEWITSON, Mr., 131.
HIPPARION, 299.
HIPPOTHERIUM, 299.

HISPIDE, imitated by Longicorns,
92.

HOLOTHURIDE, 258.

Homalocranium semicinctum, 101.
HOOKER, Dr., on the value of the

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in many cases assumed without
proof, 205; if possessed by man,
206; supposed, of Indians, 207;
supposed to be shown in the
construction of birds' nests, 211.
INTELLECT of savages compared
with that of animals, 341.
INTELLECTUAL power, range of, in
man, 339.

Iphias glaucippe, 172.

ITHOMIA, mimicked by Leptalis, 83.
Ithomia ilerdina, mimicked by four
groups of Lepidoptera, 84.

JAVA, relations of, to Sumatra
and Borneo, 193.

JAMAICA Swift altering position of
nest, 228.

JERDON, Mr., on incubation by
males in Turnix, 115.

KALLIMA inachis and Kallima
paralekta, wonderful resem-
blance of, to leaves, 59-61.

LABYRINTHODONTIA, 298,

300.

LAKES as cases of imperfect adapt-
ation, 278.

LANIADE, sexual colouring and ni-
dification of, 245.
LAMARCK'S hypothesis very dif-
ferent from the author's, 41.
Larentia tripunctaria, 63.
LAW which has regulated the in-
troduction of new species, 5;
confirmed by geographical dis-
tribution, 9; high organization
of ancient animals consistent
with, 14; of multiplication in
geometrical progression, 265;

of limited populations, 265; of
heredity, 266; of variation,
266; of change of physical con-
ditions, 266; of the equilibrium
of nature, 266; as opposed to
continual interference, 268.
LAYCOCK, Dr., on law of "uncon-

scious intelligence," 360.
Leaf Butterfly, appearance and
habits of, 59-61.
LEPIDOPTERA, especially subject to
variation, 132.

LEPTALIS, species of mimic Heli-

conidæ, 82; gain a protection
thereby, 259.

LESTER, Mr. J. M., on wood-dove

and robin, 53.

LEVAILLANT, on formation of a
nest, 224.

Limenitis archippus, 88.

Limenitis limire, 172; procris, 172.
LIZARDS refusing certain moths
and caterpillars, 121; devour-
ing bees, 121.

LOCAL FORMS, 158.

LOCAL variation of form, 169; of
colour, 173; general remarks
on, 174; in Celebesian butter-
flies, probable use of, 175.
LOCUSTIDE, adaptive colouring of,
64.

LUMINOUSNESS of some insects a
protection, 71.
LYCENIDE, probable means of pro-
tection of, 176.

MAMMALS, mimicry among, 107.
MAN, does he build by reason or
imitation, 212; his works mainly
imitative, 225; antiquity of, 303,
322; difference of opinion as to

326;

his origin, 304; unity or plural-
ity of species, 305; persistence
of type of, 306; importance of
mental and moral characters,
312; his dignity and supremacy,
324;
his influence on nature,
his future development,
326; range of intellectual power
in, 339; rudiments of all the
higher faculties in savage, 341;
his feet and hands, difficulties
on the theory of natural selec-
tion, 349: his voice, 350; his
mental faculties, 351; difficulty
as to the origin of the moral
sense in, 352; development of,
probably directed by a superior
intelligence, 359.

MANTIDE, adaptive colouring of,
64; mimicking white ants, 98.
MALACODERMS, a protected group,
93.

MALURIDE, 255.

MATTER, the nature of, 363; Mr.

Bayma on, 363; is force, 365.
MECHANITIS and Methona, mi-
micked by Leptalis, 83.
MECOCERUS, dimorphism of, 155.
Mecocerus gazella, 94.
MEGACEPHALON, 196.

MEGAPODIDE, sexual colouring and
nidification of, 246.

MEROPOGON, 196.
Midas dives, 97.

MIMETA, mimicking Tropidorhyn-
chus, 104.

MIMICRY, meaning of the word,
74; theory of, 76; among Lepi-
doptera, 77; how it acts as a
protection, 80, 81; of other in-
sects by Lepidoptera, 89; among

beetles, 91; of other insects by
beetles, 95; of insects by species
of other orders, 97; among the
vertebrata, 99; among snakes,
101; among tree frogs, 103;
among birds, 103; among mam-
mals, 107; objections to the
theory of, 108; by female in-
sects, 110; among Papilionidæ,
179; never occurs in the male
only, 200.

MOMOTIDÆ, sexual colouring and
nidification of, 241.
MONTROUZIER, M., on butterflies
of Woodlark Island, 152.
MORAL sense, difficulty as to the
origin of, 352.
MORPHOS, how protected, 73.
MURRAY, Mr. Andrew, objections
to theory of mimicry, 108.
MUSCICAPIDE, sexual colouring
and nidification of, 245.
MUSOPHAGIDE, sexual colouring
and nidification of, 242.

NAPEOGENES, all the species
are mimickers, 85.
NATURAL selection, the principle
stated, 41-43; general accept-
ance of the theory of, 46;
tabular demonstration of, 302;
outline of theory of, 307; its
effects on man and animals dif-
ferent, 311; hardly acts among
civilized societies, 330; what it
can not do, 333; cannot pro-
duce injurious or useless modi-
fications, 334.
NECTARINEIDE, 254.
NECYDALIDÆ, mimic Hymenop-
tera, 96.

Nemophas grayi, a Longicoru mi-
micked by a Longicorn, 95.
NESTS of Birds, why different,
215; of young birds, how built,
219; construction of, described
by Levaillant, 224; imperfec-
tions in, 229; influenced by
changed conditions and per-
sistent habits, 232; classification
of, according to function, 237.
NEW FORMS, how produced by
variation and selection, 286.
NEW GUINEA, relation of the seve-
ral Papuan islands to, 194.
NOCTURNAL animals, colours of,
51.
NOMADA, 98.

OBEREA, species resemble Ten-
thredinidæ, 96.
Odontocera odyneroides, 96.
ODONTOCHEILA, 97.
Odynerus sinuatus, 90.
Onthophilus sulcatus, like a seed,
58.

Onychocerus scorpio, resembles
bark, 56.

ORANGE-TIP butterfly, protective
colouring of, 59.

ORCHIS, structure of an, explained
by natural selection, 271.
Orgyia antiqua and O. gonostigma,
autumnal colours of, 62.
ORIOLIDÆ, 253.

Ornithoptera priamus, 145, 173;
O. helena, 173.

Oxyrhopus petolarius, O. trigemi-
nus, O. formosus, 102.

OWEN, Professor, on more gene-
ralized structure of extinct ani-
mals, 298.

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