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