Contributions to the Theory of Natural Selection

Tools, importance of, to man, 314 (#x9_x_9_i19).

Tree frogs, probable mimicry by, 103 (#x3_x_3_i53).

Tricondyla, 97 (#x3_x_3_i40).

Trimen, Mr., on rank of the Papilionidæ, 136 (#x4_x_4_i33).

Tristram, Rev. H., on colours of desert animals, 50 (#x2_x_2_i48).

Trochilium tipuliforme, 90 (#x3_x_3_i34).

Trogonidæ, sexual colouring and nidification of, 241 (#x7_x_7_i20).

Tropical birds often green, 52 (#x2_x_2_i51).

Tropics, most favourable to production of perfect adaptation among animals, 68 (#x3_x_3_i3);

not favourable to growth of civilization, 318 (#x9_x_9_i26).

Tropidorhynchus mimicked by orioles, 104 (#x3_x_3_i56).

Truthfulness of some savages, 353 (#x10_x_10_i10);

not to be explained on utilitarian hypothesis, 354 (#x10_x_10_i11).

Turdidæ, sexual colouring and nidification of, 245 (#x7_x_7_i45).

Turnix, 115 (#x4_x_4_i5), 251 (#x7_pgepubid00084).

Tyndall, Professor, on origin of consciousness, 361 (#x10_x_10_i23).

Upupidæ, sexual colouring and nidification of, 241 (#x7_x_7_i20).

Useful and useless variations, 34 (#x2_x_2_i22).

Utility, importance of the principle of, 47 (#x2_x_2_i41), 127 (#x4_x_4_i20).

Variability, simple, 144 (#x4_x_4_i43).

Variations, useful and useless, 34 (#x2_x_2_i22);

laws of, 143 (#x4_x_4_i41), 266 (#x7_x_7_i92);

as influenced by locality, 166 (#x5_x_5_i5);

of size, 168 (#x5_x_5_i8);

universality of, 287 (#x8_x_8_i30)-291 (#x8_x_8_i34);

are there limits to, 291 (#x8_x_8_i34);

of domestic dogs, 293 (#x8_x_8_i36);

of pigeons, 293 (#x8_x_8_i36).

Varieties, instability of, supposed to prove the permanent distinctness of species, 26 (#x2_pgepubid00014);

if superior will extirpate original species, 36 (#x2_x_2_i25);

its reversion then impossible, 37 (#x2_x_2_i27);

of domesticated animals may partially revert, 38 (#x2_x_2_i27), 40 (#x2_x_2_i31);

inconvenience of using the term, 161 (#x4_x_4_i57).

Vertebrata, mimicry among, 99 (#x3_x_3_i44).

Voice of man, not explained by natural selection, 350 (#x10_x_10_i4).

Volucella, species of mimic bees, 75 (#x3_x_3_i13), 98 (#x3_x_3_i43).

WALSH, Mr., on dimorphism, of Papilio turnus, 153 (#x4_x_4_i49).

Weapons and tools, how they affect man’s progress, 314 (#x9_x_9_i19).

Weevils often resemble small lumps of earth, 58 (#x2_x_2_i62).

Weir, Mr. Jenner, on a moth refused by birds, 89 (#x3_x_3_i32);

on beetles refused by birds, 93 (#x3_x_3_i36);

on caterpillars eaten and rejected by birds, 119 (#x4_x_4_i7).

Westwood, Professor, objections to theory of mimicry, 108 (#x3_pgepubid00041).

White colour in domesticated and wild animals, 66 (#x3_x_3_i1).

Wild and domesticated animals, essential differences of, 38 (#x2_x_2_i27)-41 (#x2_x_2_i32).

Will really exerts force, 367 (#x10_x_10_i31);

probably the primary source of force, 368 (#x10_x_10_i31).

Wood, Mr. T. W., on orange-tip butterfly, 59 (#x2_x_2_i64).

Woodcocks and Snipes, protective colouring of, 53 (#x2_x_2_i54).

Woodpeckers, why scarce in England, 32 (#x2_x_2_i20).