INDEX.
IX.
Hogs, imported by Columbus into
America, 52.
Holmes, Dr. Oliver W. : on
variation, 3-4 ; on influence of
external conditions on coloura
tion of insects, 402.
Homology, Law of: 336-7.
Homoptera : protective secretion
of, 166.
Hooker, Sir Joseph (quoted by
Wallace) : on usual abortiveness
of attempts to naturalise plants,
in; on geographical distribu
tion of plants, 530.
Horse-breeding : types to be aimed
at in, 143-4.
Horses: isolation in breeding, 381;
influence of external conditions
on, 397 > an illustration of or
ganic evolution, 552—v. also
Mares.
Race, English : evolution
of, 335-
Teeth of: an illustration of
organic evolution, 552-3.
Trotting, American : 335,
433-
Wild : rough games of, 100;
extinction of, in South America,
318-
Horse-fly, English, in New Zea
land : destruction of, by native
fly, 105.
House, Prof. E. H.: on hereditary
athleticism, 434.
Huber, Pierre : on animal in
stinct, 228, 278.
Hudson, W. H.: on destruction
following a great “ wave of life ”
among imported animals, etc.,
53, 54, 2 97 5 on parental devotion
in deer, 83 ; on co-operation and
strife for mastery amongst mam
mals, 99-102; on difference be
tween flocks of birds and herds
of cattle, 99 ; on persecution of
wounded individual by herd,
100- 1 ; on rescuing instinct,
101- 2 ; on protective effluvium
of skunk, 210, 211-2 ; example of
instinct in mice and absence of
instinct in all cats but one, 231 ;
on habits of bisache, 253,
254.
Humboldt, Alex. v. (quoted by
Darwin) : on influence of exter
nal conditions on man, 398.
Hutchinson, Rev. H. N. : on
Cuvier’s discovery of extinct
types, 314.
Huxley, Prof. Thos. H. : on
variation, 10, 35 ; on chance in
Natural Selection, 26-7, 29-30,
70-1 ; on rate of increase of
plants, 47 ; on stability of spe
cies, 294-5 > on principles of
evolution, 464 ; on the facts of
organic evolution, 468 ; on “nihil
per saltum,” 486.
Hybridisation : 350-2 ; on contin
uous fertility of offspring, 353-6.
Increase : in Geometrical Ratio, 43-
59 ; destruction a check to, 47 ;
in imported animals and plants,
5 I *4* .
Incubating Instinct: 264-7.
Insects : indiscriminative destruc
tion of life of, 63 ; accidental
death amongst, 162-7 5 expanse
of wing in, 165 ; protective secre
tion in, 166 ; protective elasticity
in, 166-7 5 correlation between
conspicuous colouration and nau
seous taste of, 207-8 ; tannin in,
404 ; cause of colouration of, 405,
406-8; non-useful variation in, 411.
Neuter: 267-76.
Walking-stick : protective
colouration, etc., of, 176.
Instinct, Animal: 123-30, 220-30;
instinctive comprehension by in
sect-eaters, etc., of correlation
between conspicuous colouration
and nauseous taste in insects,
etc., 208-12 ; instinct and intelli
gence act apart, 230-2 ; evolution
of instincts precedes intelligence,
232-41 ; instincts developed by
Natural Selection, 241-51 ; intel
ligent animals unobservant of
actions not intelligently per
formed yet inherited, 251-63 ;
loss of, 259-63 ; instincts de
veloped apart from intelligence,
263-7 ; instincts acquired by in
dividuals not inherited, 267-89;
variation of, 279-85.