IIO EXPLANATION OF TERMS 



Propneustic: larval forms in which only the most anterior spiracles occur. 



Propodeon: = propodeum. 



Propodeum: in Hymenoptera, that part of thorax just above insertion of 



abdomen, and really the first abdominal segment : see median segment. 

 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 pygidium, some- 

 times 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., Elatcridcc, 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 pro- 

 sternum which more or less conceals the mouth from below. 

 Prosternal spine: the curved mucro in Elateridce 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 



from 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 forms 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 Dipt era, a strong bristle immediately above the front 



coxa : see propleural bristles. 

 Prothoracic glands: occur in Orthoptera. on the sides of prothorax in certain 



]'h as mid genera. 

 Prothoracic shield: = cervical shield; q. v. 

 Prothoracotheca: the pupal covering of prothorax. 

 Pro-thorax: the first thoracic ring or segment ; bears the anterior legs but 



no wings: when free, as in Coleoptera, is usually referred to as "thorax' 



merely. 



