BASILORNIs, 196.
BATEs, Mr., first adopted the word
“mimicry,” 75; his observations
on Leptalis and Heliconidae, 82;
his paper explaining the theory
of mimicry, 83; objections to
his theory, 108; on variation,
165; on recent immigration of
Amazonian Indians, 214.
IBAYMA, 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; midi-
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
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.
Ceroaylus laceratus, imitates a
moss-covered stick, 64.
CERTHIOLA, sexual colouring and
nidification of, 244.
Cethosia aeole, 172; biblis, 172.
CETONIADE, how protected, 73;
similar colours of two sexes,
114.
CEYCOPSIs, 196.
Charis melipona, 96.
CHEMATOBIA, wintry colours of this
genus, 62.
Chlamys pilula, resembles dung of
caterpillars, 58.
CHRYSIDIDAE, how protected, 72.
CHRYSOMELIDAE, similar colouring
of two sexes, 114.
CICINDELA, adaptive colour of va-
rious species of, 57.
Cilic 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, 3.16.
CoMPsogNATHUs, 300.
Condylodera tricondyloides, 97.
CoNscroUSNEss, origin of, 360;
Professor Tyndall on, 361; not
a product of complex organiza-
tion, 365.
CoRRELATION of growth, 310.
Corynomalus sp., 92.
CoTINGIDAE, sexual colouring and
midification of, 244.
CRATOSOMUs, a hard weevil, 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.
CYNoPITIIECUs, 196.
Cynthia arsinoë, 172.
DANAIDAE, the subjects of mimi-
cry, 85, 86.
Danais erippus, 88; chrysippus,
1.12; 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.
I)ESERT animals, colours of, 49, 50.
DIADEMA, species of, mimic Danai-
day, 86, 87: female with male
colouration, 112.
Diadema misippus, 1.12;
mala, 113.
Diaphora mendica, 89.
DICNYoDoNTIA, 299.
JDICROURUs, 253.
Diloba caeruleocephala, 120.
DIMORPHISM, 145; in beetles, 155;
in birds, 155; illustrated, 157.
DINOSAURIA, 298.
DIPTERA mimicking wasps and
bees, 97.
Doliops curculionides, 94.
ExTINCTION of lower races, 318.
FEMATE 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 querei, 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.
Grallima 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.
IHAIRY 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-
culionidae, 94.
ITELICONIDE, the objects of mimi-
cry, 77; their secretions, 88;
not attacked by birds, 79; some-
times mimicked by other Heli-
conidae, 85.
HELLADOTHERIUM, 300.
HEMIPTERA, protected by bad
odour, 72.
HERBERT, Rev. W., on song of
birds, 221.
HESPERIDAE, probable means of
protection of, 176.
HESTHESIs, longicorns resembling
ants, 96.
Hestia leuconoë, 180.
HEwitson, Mr., 131.
HIPPARION, 299,
HIPPOTHERIUM, 299.
Hisproß, imitated by Longicorns,
92.
HoHo's HURIDE, 258.
Homalocranium semicinctum, 101.
HookER, Dr., on the value of the
“specific term,” 165.
HousEs of American and Malay
races contrasted, 213.
Hux.Ey, Professor, on “Physical
Basis of Life,” 362, on volition,
368.
HYANICTIs, 300.
HYBERNIA, wintry colours of this
genus, 62. -
HyMENOPTERA, large number of,
peculiar to Celebes, 196,
ICTERIDAE, sexual colouring and
midification of, 244.
ICTIIYopTERYGIA, 298.
Ideopsis daos, 180.
IMITATION, the effects of, in man's
works, 212,
INDIANs, how they travel through
trackless forests, 207.
INSECTs, 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;
|