Pregenicular: in Orthoptera, that portion of femur proximad the knee. Pregenicular annulus: a more or less conspicuous color ring on the caudal femora proximad the knee in Orthoptera. Pre-halter: a membranous scale in front of the true haltere of a fly. Prehension: structures fitted for grasping or holding. Pre-mandibular: situated in front of the mandible: applied to a temporary segment of the embryo: = intercalary segment. Pre-media: Ephemeridae; an apparently distinct vein between radius and media (Comst.). Premorse: as if bitten off: with a blunt or jagged termination. Prensor: the genital lateral clasping organ of male Lepidoptera: see clasper. Pre-ocular: see prae-ocular. Pre-oral: in front of the mouth: the embryonic head segments before those bearing the mouth parts. Prepuce: =praeputium; q.v. Pre-pupal: that stage in the larva just preceding the change to pupa. Pre-scutellar bristles: in Diptera, are in a transverse row in front of the scutellum. Pre-scutellar callus: = post-alar callus: q.v. Pre-scutellar rows: in Diptera, short rows of small bristles in front of the scutellum. Press: =filator; q.v. Pressure plate: a structure at base of pulvillus, which exerts a pressure on the sole of the pad. Pre-sutural bristles: in Diptera, in a trigonate depression at outer ends of transverse suture, near dorso-pleural suture. Pre-sutural inter-alar bristle: the single bristle of the interalar series, situated before the transverse suture. Primaries: the anterior or fore-wings. Primitive: simple in character; of an early or ancient type. Principal sector: in Odonata, extends from its point of separation From the median sector to the outer margin, at or just below the apex:= media 1 (Comst.). Principal sulcus: in Orthoptera, a transverse impression of the prothorax, at or behind the middle. Priodont: applied to those forms of male Lucanids that have the smallest mandibles: see teleodont, mesodont, amphiodont. Prismatic: formed like a prism: a play of colors similar to that produced through a prism. Pro-: anterior: used as a prefix to designate the parts of the first thoracic segment. Proboscidea: an ordinal term for the Coccidae. Proboscis: generally applied to any extended mouth structure; usually applied to the extensile mouth of the Diptera; frequently to the beak of Hemiptera; sometimes to the tongue of Lepidoptera; and rarely, to the mouth of long-tongued bees. Procephalic: relating or belonging to the procephalon. Procephalic lobes: in the embryo, form part of the anterior, overhanging portion of the head. Procephalon: that segment of the head in the embryo which is formed by the coalescence of the first three primitive segments. Procerebral: that segment of the brain containing the median protocerebrum and optic ganglia; also called optic segment. Procerebral lobes: the central portion of the cerebrum, made up of the fused median lobes, giving rise to the mushroom bodies; q.v.