Propolis: a glue or resin-like product elaborated by bees to serve as a cement in cases where wax is not sufficiently tenacious. Propulsatory: that which drives onward or forward. Propupa: a semi-pupa: q.v. Propygidium: the dorsal segment or tergite in front of the pygidilini, sometimes left exposed in Coleoptera. Propygium: = Hypopygium: q.v. Proscutum: the scutum of the pronotum. Proscutellum: the scutellum of the pronotum. Prostemmatic: = ante-ocular; q.v. Prosternal: belonging to the prosternum. Prosternal grooves: occur laterally in some Coleoptera. e.g. Elateridae, to receive the antennae. Prosternal epimera: the epimera of prothorax. Prosternal episterna: the episterna of prothorax. Prosternal lobe: in some Coleoptera, an anterior prolongation of the prosternum which more or less conceals the mouth from below. Prosternal spine: the curved mucro in Elateridae which extends backward into a meso-sternal cavity: the cone or tubercle between fore-legs in some Orthoptera. Prosternal suture: that suture of pro-thorax which separates the sternum front the pleural pieces. Prosternellum: the sternellum of the prothorax Prosternum: the fore-breast: the sclerite between the fore-legs. Prostheca: a mandibular sclerite set with hair, articulated to the basalis - q.v. -and equal to the lacinia of the maxilla. Protamphibion: a name applied by P. Mayer to the hypothetical common ancestor of the Perlina, Ephemerina and Odonata. Protandry: the appearance of males earlier in the season than females. Protarsus: the tarsus of the anterior leg. Proteiform: having many fortes or varieties: protean. Protergum: in Odonata, the upper surface of prothorax. Proterotypes: primary types, including all the material upon which the original description is based. Prothoracic bristle: in Diptera, a strong bristle immediately above the front coxa: see propleural bristles. Prothoracic glands: occur in Orthoptera, on the sides of prothorax in certain Phasmid genera. Prothoracic shield: = cervical shield: q.v. Prothoracotheca: the pupal covering of prothorax. Pro-thorax: the first thoracic ring or segment: hears the anterior legs but no wings: when free, as in Coleoptera. is usually referred to as "thorax" merely. Protocerebral segment: = ocular seginent; q.v. Protocerebrum: the primitive anterior cerebral vesicle. Protocosta: the thickened costal margin of Lepidopterous wings. Protocranium: the posterior part of the epicranium: sometimes used as Occiput. Protogonia: the apical angle of the primaries. Protograph: all original description by a figure or picture made from the original type. Proto-lepidoptera: proposed for those forms (Eriocephalidae) in which lacinia and mandibles are obvious and the spiral tongue is not developed: see neolepidoptera and paleolepidoptera. Protolog: the original description by words. Protoloma: the anterior margin of primaries.