nch (_Astragalinus tristis_),
flight song of, 43, 44;
other notes of, 44;
musical festivals of, 104.

Gophers, an interesting incident, 237, 238.

Grackle. _See_ Crow blackbird.

Grebe, and loon, 235, 236.

Gregariousness, its effect on individuality, 118, 119.

Groos, Karl, his work on _The Play of Animals_, 87, 100.

Grouse, flight of, 4.

Grouse, ruffed (_Bonasa umbelius_), 71, 94;
drumming of, 177, 257;
the "Hermit's" incredible story of a, 179, 180;
feeble vocal powers of, 257.

Grouse, spruce, or Canada grouse (_Canachites canadensis canace_), 260.

Hamerton, Philip Gilbert, his _Chapters on Animals_, 124, 237.

Hawk, broad-winged (_Buteo platypterus_), 74.

Hawk, fish, or American osprey (_Pandion haliaetus carolinensis_), 213.

Hawk, marsh (_Circus hudsonius_), a young, 99.

Hawk, red-shouldered (_Buteo lineatus_), 222, 223.

Hawk, red-tailed (_Buteo borealis_ and subsp.), 102.

Hawks, alleged mimicry among, 248, 249.

"Hermit,"
his false natural history, 93-95;
his stories of cowbirds and a grouse, 178, 179.

Hibernation, 48, 49.

Hickory nut, 251, 252.

_Home Life on an Ostrich Farm_, 135, 136.

Homing instinct, the,
a remarkable trait, 53;
an instance of its workings, 53-57, 99;
nature of, 235.

Honeysuckle, a shoot of, 24, 25.

Horses,
ignorant fear in, 123;
self-destruction of, 146, 162;
a mare and her blind companion, 226, 227.

Hyla, peeping,
hibernation of, 48;
a second period of peeping, 231, 232.

Indigo-bird (_Cyanospiza cyanea_), flight song of, 44.

Individuality, effects of solitude and gregariousness upon, 118, 119.

_Industries of Animals_, 137.

Inferences, right, 231-238.

Insects stilled by the cold, 49, 50.

Instinct, 1;
demoralized, 73, 74;
one instinct overcoming another, 74;
makes up nine tenths of the lives of our wild neighbors, 74;
a kind of natural reason, 76;
in connection with parasitism, 79, 80;
importance of, 81;
origin and development of, 81, 82;
not always inerrant, 155;
machine-like action of, 158, 159;
non-progressive, 212;
nature of, 254-257;
variability of, 257-261.

Jackals, 142.

Jackdaw, the Bishop of Carlisle's story of a, 148.

Jay, blue (_Cyanocitta cristata_),
Mr. Keyser's young bird, 69, 70;
hiding instinct of, 161, 251, 263.