Common Owl.

Oyster-plant.

Pelopaeus.

Pérez, Professor.

Philanthus apivorus.

Phylloxera.

Pieris brassicae.

Pine Processionary.
silken road of.
nest.
use of road.
senses.
nest.
the processionary march.
experiments.
on a circular track.

Pliny, on the Cabbage Caterpillar.

Pompilus.

Rose-chafer.