44 EXPLANATION OF TERMS 



Endotrachea: the inner surface or lining of the trachea: see intima. 



Enervis: applied to wings without veins of any kind. 



Engraved: see exsculptus. 



Ensiform: sword-shaped: two-edged, large at base and tapering to the point: 

 see anceps. 



Entad: extending inwardly from without. 



Ental: referring to the centre of the body cavity. 



Enteric: relating to the digestive canal or enteron. 



Enteron: the digestive canal as a whole; a general term. 



Entire : with an even unbroken margin : said of wings when they are not 

 divided or cut into. 



Entoderm: the innermost germ layer of the embryo, from which are derived 

 the epithelium of the alimentary canal and accessory structures : = endo- 

 derm and hypoblast. 



Entognathous: see entotrophous. 



Entoloma: the inner margin of the wings. 



Entomogenous: growing in or on an insect: e. g., fungi. 



Entomography: the description of an insect or of its life history. 



Entomolin: chitin, q. v. 



Entomologist: one who collects and studies insects. 



Entomology: that branch of Zoology that deals with insects and, specifically, 

 the Hexapods. 



Entomophagous: feeding upon insects: specifically applied to those wasps 

 that feed their young with larvae, etc. 



Entomophilous: insect-loving: applied to plants especially adapted for pol- 

 lination by insects. 



Entomophytous: referring to plants produced in or on an insect: see ento- 

 mogenous. 



Entomosis: a disease caused by a parasitic insect. 



Entomotaxy: the preservation and preparation of insects for study. 



Entomotomy: that science which deals with internal structure of insects. 



Entomotomist: a student of insect structure. 



Entosternum: the internal processes from the sternum. 



Entothorax: applied to the apodemes or processes extending inwardly from 

 the sternal sclerites : see apophysis. 



Entotrophous: with the mouth parts buried in the head: = entognathous : 

 see ectotrophous. 



Entozoa: those animals that live within the body of others. 



Environment: the sum of the influences surrounding or acting upon an or- 

 ganism. 



Enzyme: a ferment secreted by a cell or a gland. 



Epalpate: having no palpi. 



Ephebic: referring to the winged, adult stage. 



Ephemerida: May-flies: an ordinal term used for insects with net-veined 

 wings, held vertically when at rest, not folded; mouth mandibulate, not 

 functionally developed; thorax loosely agglutinated; abdomen with anal 

 filaments ; metamorphosis incomplete. 



