Salmon, migration of, 249, 250

Salticus scenicus, 213

Sandpipers, nidification of, 292

Sarsia, seeking light, 23

Saunders, S. S., on trap-door spiders, 215

Savage, on play of chimpanzees, 476, 477

Schiller, on pride of bell-wether steers, 334

Schipp, Lieut., on combined action of baboons, 483

Schlosser, on jaculator-fish, 248

Schlüter, Herr A., on a hornet carrying heavy prey up an elevation in order to fly away with it, 196

Schneider, on intelligence of octopus, 29, 30;
on fish guarding eggs, 242;
jealousy of fish, 247

Sclater, Dr., on instincts of cuckoo, 325;
lending a cebus for observation, 483

Scoresby, on maternal affection of whale, 327;
on intelligence of polar bear, 351

Scorpion, alleged suicide of, when surrounded by fire or heat, 222-25

Sea-anemones, 233, 234

Seals, intelligence of, and breeding-habits of pinnipeds, 341-6

Seebohm, on instincts of cuckoo, 325

Semnopithecus entellus, destroying poison fangs of snakes, 483

Sensation, 8

Severn, H. A., on nidification of baya-bird, 294

Severn, W., on snakes, 260, 261

Sheep, pride of leaders, 334

Shelley, lines on curiosity of fish, 247

Shipp, Capt.,
on vindictiveness of elephant, 387, 388;
on intelligence of elephant, 397, 398

Siebold, on robber-wasps, 169

Sieur, Roman, his trained birds, 312

Signs, made by ants, 49 et seq.;
by bees, 157 et seq.;
by termites, 200;
by birds, 315, 316;
by elephants, 391 and 401;
by cat, 416;
by dog, 445-7;
by monkey, 472, 475, 476

Simiadæ, see Monkeys

Simonius, on fondness of spiders for music, 206

Sinclair, W., on intelligence of horse, 33

Skate, supposed intelligence of, 251

Skinner, Major,
on intelligent vigilance of elephants, 400, 401;
on training of cobra, 265

Slingsby, his experiment in training a house-fly, 230, 231

Smeathman, on termites, 198-203

Smeaton, Th. D., on dog making peace-offerings, 452

Smiles, Dr. S.,
on observation of Stephenson, 247;
on observations of Edward, 255, 275, 283, 321

Smith, A. P., on intelligence of a cat, 414

Smith, Colonel, on pilot-fish, 252

Smith, Colonel Hamilton, on intelligence of cattle-dogs, 449

Smith, Sir Andrew, on revenge of a baboon, 478

Snails, intelligence of, 26-28

Snakes, incubating eggs, sexual and parental affection of, 256;
tamed, 256, 260-3, 265;
finding way home, 262;
intelligence of, 262-3;
fascination by, 263-4;
charming of, 264-5

Social feelings, see Sympathy and Affection;
habits common to Hymenoptera and termites, 202

Sow, pointing game, 339, 340

Sparman, on termites, 198

Spencer, Herbert,
on migration of salmon, 249;
on play as allied to artistic feeling, 279

Sphex, see under Wasp

Spiders, emotions of, 204-7;
courtship, 204, 205;
strength of maternal instinct, 205;
fondness of music, 205-7;
web-building, 207-12;
geometric, 209;
water, 212;
wolf or vagrant, 213;
trap-door, 213-18;
admit of being tamed and distinguish persons, 218-19;
protecting eggs from cold, 219;
protecting themselves from ecitons, 219;
conveying prey to larder, 220;
suspending weights to steady web, 220-2;
wide geographical range of trap-door spiders, 216

Stag, intelligence of, 336

Starlings, nidification of, 293;
learning to avoid telegraph-wires, 312-13

Stephenson, on curiosity of fish, 247

Stevens, J. G., on intelligence of a cat, 417-18

Sticklebacks, 243-5, 246-7

Stickney, on bees remembering in successive years the position of a disused hive, 154

Stodmann, on wasps recognising persons, 188

Stone, on reasoning power of a dog, 460

Stork, vindictiveness of, 277-8

Strachan, on elephants dying under emotional disturbance, 395-6

Strange, F., on habits of bower-bird, 281

Strauss, on co-operation of beetles, 228

Street, J., on blackbirds removing their young, 289

Strickland, on intelligence of a mare, 332

Swainson, on vindictiveness of elephant, 389

Swallows, memory of, 266;
improvement in their nidification and adopting new modes of, 300;
migration, 301;
making tunnels, 318;
killing imprisoned hostile sparrows, 318-19

Swan, conjugal fidelity of, 271;
mode of escaping with young, 290;
nidification, 496-8

Swine, 339-41

Sword-fish, 252-3

Sykes, Colonel,
on harvesting ants, 97;
on tree ants, 110-11;
intelligence of ants in getting at food in difficult situations, 134, 135;
on nidification of tailor-bird, 293

Sylvia, 293

Sympathy,
of ants, 46-9;
of bees, 155-6;
of fish, 242;
of birds, 270-6;
of horse, 331-2;
of ruminants, 334;
of elephants, 387-92, and 397, 398;
of cat, 416;
of monkeys, 471-5




Talegallus, nidification of, 294

Taylor, the Rev. Mr., cunning of his dog, 451

Tegetmeier, on amount of sugar required by bees to make honey, 176

Telescope-fish, 246

Tennent, Sir E., on apparent intelligence of land-leeches, 24;
intelligence of tree-ants, 134;
mygale eating humming birds, 208;
climbing-perch, 249;
sexual affection of cobra, 246;
snake-charming, 264, 265;
taming of cobra, 265;
nidification of baya-bird, 294;
combined action of crows, 319, 320;
of buffaloes, 335;
use of tame buffalo, 335;
on emotions and intelligence of elephant, 389, 390, 393-6, 400-8;
collective instinct of jackals, 432, 433

Tepper, Mr. Otto, on intelligence of a cat, 424

Termites, 198-203;
architecture, 198, 199, and 201, 202;
workers and soldiers, 200, 201;
swarming, breeding, &c., 202;
remarkable similarity of instincts to those of Hymenoptera, 202;
instincts detrimental to individual but beneficial to species, 202, 203

Terns, sympathy of, for wounded companions, 274, 275;
robber, 284;
mobbing robber-terns, 291

Theda isocrates, 238

Theuerkauf, Herr G., on intelligence of ants in making a bridge of aphides over tar, 136

Thompson, E. P.,
on bees remembering exact position of absent hive, 149;
on garden-spider's mode of web-building, 210, 211;
ant-lion, 234, 235;
emotions of guana, 255, 256;
fascination by snakes, 264;
nidification of sociable grosbeak, 295, 296;
birds dreaming, 312;
maternal affection of whale, 327;
bisons defending themselves from wolves, 334, 335;
pigs defending themselves from wolves, 339;
cleanliness of pig, 340, 341;
intelligence of weasel, 346;
of mouse, 361;
harvesting-mice, 365, 366

Thomson, Dr. Allen, on scorpions committing suicide, 223-5

Thornton, Colonel, his sow trained to point game, 340

Thresher-fish, 252, 253

Thrushes, breaking shells against stones, 283

Tinea, 237

Toads, 254, 255

Tomtit, nidification of, 293

Topham, Dr. J., on spiders weighting their webs, 222

Topham, Mr. J., on bees remembering exact position of absent hive, 149

Tortoises, knowing persons, 259

Townsend, the Rev. W.,
on elephant concealing theft, 410;
on dog finding its way about by train, 468-9

Truro, Lord, on intelligence of a dog, 450

Turner, George, on bees remembering exact position of absent hive, 149

Turnstones, intelligence of, 321

Turtles, 257, 258, and 262