Bower-bird.

Brussels Sprouts, ancestry of.

Buprestis.

Burying-beetles: method of burial.
appearance of the insect.
manipulation of the corpse.
cooperation of individuals.
larvae of.
attacked by vermin.
the dismal end of.
experiments.
test conditions imposed.
conditions of burial.
nets of cordage cut through.
ligatures severed.
limitations of instinct.

Cabbage, ancestry of.
offspring.

Cabbage Butterfly, her selection of suitable Cruciferae.
eggs of.
hatching of the eggs.

Cabbage-caterpillar.
eats egg-cases on emergence.