IOS EXPLANATION OF TERMS 



Pre-media: Ephemeridce; an apparently distinct vein between radius and 



media (Comst.). 

 Premcrse: as if bitten off: with a blunt or jagged termination. 

 Prensor: the genital lateral clasping organ of male Lcpidoptera : 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: = prseputium ; q. v. 



Pre-pupal: that stage in the larva just preceding the change to pupa. 

 Pre-scutellar bristles: in Dipi era, 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, situ- 

 ated 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 i 



(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 Coccidce. 

 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. 



