Pneustocera: breathing horns: the prolongations of the metathoracic spiracles in Berytidae, etc.
Pnystega: in Odonata, applied by Charpentier to a portion of mesonotum
Pobrachial: a longitudinal vein of the Ephemerid wing just behind praebrachial; usually simple: number 7 of some systems.
Podeon: in Hymenoptera, the petiole: the true second abdominal segment.
Podex: the upper plate of the anal opening; = supra-anal or sur-anal plate in caterpillars.
Podical plates: the latero-ventral plates attached to the loth abdominal segment of Orthoptera; the two pieces on each side of the vent, thought by Huxley to be rudiments of an 11th abdominal ring; united they form the tergite of a rudimentary ring: = anal valves: paranal lobes.
Pododunera: apterous insects with biting mouth structures.
Podotheca: that part of pupa that covers the legs of future adult.
Poecilocyttares: social wasps that build their combs around the branch or other support covered by the envelope: see stelocyttares and phragmocyttares.
Poisers: = halteres and balancers; q.v.