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.

Protomesal: applied to certain areolets in Hymenoptera, situated
between costal cells and apical margin.

Prototergite: the foremost dorsal segment of abdomen.

Preto-thorax: = prothorax: q.v.

Prototype: a primitive form to which later forms can be traced.

Protractor: that which extends or lengthens out: applied to muscles.

Protuberance: any elevation above the surface.

Protuberant: rising or produced above the surface or general level.

Proventriculus: the posterior portion of crop: the gizzard.

Proximad: toward the proxi