- Synapta, 258.
- TACHORNIS phœnicobea, 228.
- Tachyris hombronii, 172; ithome, 172; lycaste, 172; lyncida, 172; nephele, 172; nero, 172; zarinda, 172.
- Tanagridæ, sexual colouring and nidification of, 245.
- Tapir, 299.
- Telephori, similar colouring of two sexes, 114.
- Temperate and cold climates favourable to civilization, 318.
- Thecodontia, 299.
- Therates, mimicked by Heteromera, 95.
- Thyca descombesi, 172; hyparete, 172; rosenbergii, 172; zebuda, 172.
- Tiger, adaptive colouring of, 52.
- Times newspaper on Natural Selection, 296.
- Tools, importance of, to man, 314.
- Tree frogs, probable mimicry by, 103.
- Tricondyla, 97.
- Trimen, Mr., on rank of the Papilionidæ, 136.
- Tristram, Rev. H., on colours of desert animals, 50.
- Trochilium tipuliforme, 90.
- Trogonidæ, sexual colouring and nidification of, 241.
- Tropical birds often green, 52.
- Tropics, most favourable to production of perfect adaptation among animals, 68; not favourable to growth of civilization, 318.
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