——, carriers, killed by hawks, [362].
——, young of, [445].
Pistil, rudimentary, [451].
Plants, poisonous, not affecting certain coloured animals, [12].
——, selection applied to, [32].
——, gradual improvement of, [37].
—— not improved in barbarous countries, [38].
—— destroyed by insects, [67].
——, in midst of range, have to struggle with other plants, [77].
——, nectar of, [92].