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Herbert, Rev. W., on song of

birds, 221.
Hesperidj;, probable means of

protection of, 176.
Hesthesis, longicorns resembling

ants, 96.
Hestia leuconoe, 180.
Hewitson, Mr., 131.
Hipparion, 299.
Hippotherium, 299.
Hispid.e, imitated by Longicorns,

92.
Holothurid.e, 258.
Homalocranium semicinctum, 101.
Hooker, Dr., on the value of the

"specific term," 165.
Houses of American and Malay

races contrasted, 213.
Huxley, Professor, on "Physical

Basis of Life," 362; on volition,

368.
Hy^nictis, 300.
Hybernia, wintry colours of this

genus, 62.
Hymenoptera, large number of,

peculiar to Celebes, 196.

ICTERIDiE, sexual colouring and
nidification of, 244.

ICTHYOPTERYGIA, 298.

Ideopsis daos, 180.

Imitation, the effects of, in man's
works, 212.

Indians, how they travel through
trackless forests, 207.

Ixsects, protective colouring of,
56: mimicking species of other
orders, 97; senses of, perhaps
different from ours, 202, 203.

Instinct, how it may be best stu-
died, 201; definition of, 203;

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
paralelcta, wonderful resem-
blance of, to leaves, 59-61.

LABYEINTHODONTIA, 298,
300.

Lakes as cases of imperfect adapt-
ation, 278.

Laniad.e, sexual colouring and ni-
dification of, 245.

Lamarck's hypothesis very dif-
ferent from the author'sy 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
Yariation, 132.

Leptalis, species of mimic Heli-
conidse, 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 Yariation of form, 169; of
colour, 173; general remarks
on, 174; in Celebesian butter-
flies, probable use of, 175.

Locustidje, adaptive colouring of,
64.

Luminousness of some insects a
protection, 71.

Lyoenid.e, probable means of pro-
tection of, 176.

MAMMALS, mimieryamong, 107.

Man, does he build by reason or
imitation, 212; hisworks mainly
imitative, 225; antiquity of, 303,
322; difference of opinion as to

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,
326; 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.

Mantid*, adaptive colouring of,
64; mimicking white ants, 98.

Malacoderms, a protected group,
93.

Malurice, 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 gasella, 94.

Megacephalon, 196.

Megapodid.e, 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

beetle?, 01; of other insects by
beetles, 95; of insects by species
of other orders, 97; among the
vertebrate, 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 Papilionidse,
179; never occurs in the male
only, 2(0.

Momotidje, sexual colouring and
nidification of, 241.

Monteouzier, 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.

Muscicapid.e, sexual colouring
and nidification of, 245.

Musophagid.e, 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.

NRCTARINEId.E, 254.

NECYdAnn,E, 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-
thredinidoe, 96.

Odontocera odyneroides, 96.

Odontocheila, 97.

Odynerus sinuatus, 90.

Onthophilus sidcatus, 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.

Oriolid^, 253.

Omithoptera 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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mus, 151; P. ormenus, 150, 152,
182; P.pammon, 147, 152, 170,
180; P. pamphylus, 171; P.
pandion, 152, 180; P. paradoxa,
87,179; P. peranthus, 160,171;
P. pertinax, 145; P. philoxenus,
182; P. polydorus, 88,170,182;
P. polytes, 147, 148; P. rhesus,
171; P. romulus, 87, 148, 150,
183; P. sarpedon, 141,158,171;
P. sataspes, 171; P. severus,
140, 144; P. M«se«s, 87, 148,
150, 169, 170, 171,180,183: P.
MwZc, 179; P. torguahis, 156;
P. turnus, 152; P. tdysses, 140,
160, 173; P. iramto, 88.

Papilionid.e, the question of their
rank, 133; peculiar characters
possessed by, 134; peculiarly
diurnal, 136; compared with
groups of mammalia, 138; dis-
tribution of, 140; large forms
of Celebes and Moluccas, 168;
large forms of Amboyna, 169;
local variation of form, 169;
arrangement of, 186; geogra-
phical distribution of, 189; of
Indo-Malay and Austro-Malay
regions, 192; of Java, Suma-
tra, and Borneo, 193.

Parid.e, sexual colouring and nidi-
fication of, 243.

Passenger pigeon, cause of its
great numbers, 308.

Patent inventions, as illustrating

classification, 295.
Phacellocera batesii, mimics one of

the Anthribidse.
Phalaropusfulicarius, 115, 251.
PhASMidjE, imitate sticks and

twig?, 64; females resembling
leaves, 112.

Phyllium, wonderful protective
colour and form of, 64.

Physalia, 258.

Pierid.e, local modification of
form in, 172.

Pieris, females only imitating
Heliconidse, 112.

Pieris coronis, 172; eperia, 172.

Pieris pyrrha, 113.

Picidj:, sexual colouring and nidi-
fication of, 242.

Pipridje, sexual colouring and
nidification of, 245.

Pittid*, 253.

Pliocerus equalis, 101; P. elapoides,
P. euryzonus, 102.

Ptsciloderma terminale, 93.

Polarity, Forbes' theory of, 17,
45.

Polymorphism, 145; illustration
of, 157.

Population of species, law of, 28;
does not permanently increase,
29; not determined by abun-
dance of offspring, 29; checks
to, 30; difference in the case of
cats and rabbits explained, 32.

Prevision, a case of, 122.

Prioniturus, 196.

Protection, various modes in
which animals obtain it, 69-71,
258; greater need of, in female
insects and birds, 113.

Protective colouring, theory of,
65.

Psittaci (Parrots), sexual colour-
ing and nidification of, £42.

Pterosauria, 298.

Ptychoderes, 94.

RACES, or subspecies, 160; of
man, origin of, 319.

Redbreast and woodpigeon, pro-
tective colouring of, 53, 54.

Representative groups, 9; of Tro-
gons, butterflies, &c., 12.

Reptiles, protective colouring of,
54.

Rhamphastid.e, sexual colouring
and nidification of, 242.

Rhinoceros, 299.

River system, as illustrating self-
adaptation, 276.

Roses, Mr. Baker on varieties of,
165.

Rudimentary organs, 23.

SALVIN, Mr. Osbert, on a case of
bird mimicry, 107.

Saturnia pavonia-minor, protective
colouring of larva of, 63.

Satyrid.e, probable means of pro-
tection of, 176.

Sauropterygia, 299.

Savages, why they become extinct,
319; undeveloped intellect of,
339,341; intellect of, compared
with that of animals, 341, 343;
protect their backs from rain,
346.

Scansorial birds, nests of, 238.

Scaphura, 98.

Scissirostrum, 165.

Scopulipedes, brush-legged bees,
91.

ScuddER,Mr.,on fossil insects, 301.

Scutellerid.e, mimicked by Long-
icorns, 96.

Sesia bombiliformis, 90.

Sesiid.e, mimic Hymenoptera, 90.

Sexes, comparative importance of,

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