Perpendicular: upright: at right angles to horizontal.

Persicinus: the red of peach blossoms.

Persistent: remaining constantly; always present.

Personate: gaping wide open; masked; disguised.

Pes, Pedes: a foot feet.

Petiolar area or Petiolarea: on the metanotum of some Hymenoptera,
the apical or hindmost of the three median cells 3d median area;
apical area.

Petiolate: that series of Hymenoptera in which there is a slender
stalk between the thorax and abdomen: = apocrita.

Petiolate: supported or placed on a stem or stalk; usually applied in
describing venation and the method of attachment of abdomen to
thorax.

Petiole: a stem or stalk: specifically the slender segment between the
thorax and abdomen in many Hymenoptera, and some Diptera.

Phaeism: applied to a duskiness of butterflies occurring in a limited
region.

Phagocyte: a corpuscle or cell that devours or absorbs noxious
organisms and also absorbs the organs of the larval stage in the
developments to the adult condition.

Phagocytosis: the destruction or devouring of bacteria or other
microorganisms by phagocytes.

Phalaenae: a Linnean term embracing most of the heterocerous
Lepidoptera: more specifically applied to the Geometridae.

Phalanx -ges: a joint or joints of the tarsus: a division of classification
of uncertain value: similar to tribe.

Phalerated: beaded.

Phallus: =penis: q.v.

Pharyngeal pump: = sucking pump; q.v.

Pharynx: the back part of the mouth and upper part of the throat: a
slight enlargement at the beginning of the oesophagus: in Diptera is
sometimes restricted to the space between the hypopharynx and sub-clypeal
pump, and is then = sub-clypeal tube.

Phauloptera: an ordinal term for the scale insects (Laporte 1835).

Phleboptera: = Hymenoptera; q.v.

Phonetic: sound producing; applied to stridulating structures.

Phosphorescent: shining or glowing in the dark, like phosphorus.

Photogenic: a light producing structure; producing a
Phosphorescent glow.

Phragma: a partition or dividing membrane: longitudinal, thin
partitions passing down from the dorsum of meso- and meta-thorax:
the partition formed by the inflexed hinder edge of prothorax.

Phragmocyttares: social wasps in which the combs of the nest are
wholly or partly supported by the covering envelope: see stelocyttares:
poecilocyttares.

Phthiriasis: a diseased condition of the skin caused by sucking lice.

Phyllophagous: feeding upon leaf tiss