46 EXPLANATION OF TERMS 



Episternum: the anterior and larger lateral thoracic sclerite between the 

 sternum and notum. 



Epistoma -is: the lower face between the mouth and eyes: that sclerite 

 immediately behind or above the labrum, whether it be clypeus or an in- 

 termediate piece : in Diptera, that part of the face between the front and 

 the labrum ; the oral margin and an indefinite space immediately contiguous 

 thereto and so peristoma : in Odonata; = clypeus : = : hypostoma. 



Epithelium: the layer of cells which covers a surface or lines a cavity. 



Epizoa: insects that infest the body surface of animals. 



Epizootic: living or parasitic on animals from the outside or on the surface. 



Epomiae: the elevated margin of an oblique furrow in the propleurae for the 

 reception of the front femora ; Hymenoptera. 



Epupillate: an ocellate spot included by a colored ring, but destitute of a 

 pupil or central spot. 



Equal: of the same length, size or shape: the superfices when they are 

 without inequalities. 



Equitant: laminated: folding one upon the other. 



Erect: standing upright; not necessarily perpendicular. 



Erectile: capable of being erected; applied to an appendage, a hair or other 

 process, or to any tissue which may be distended and made rigid. 



Erecto-patent: the wings of Hesperids when at rest; primaries erect, second- 

 aries horizontal. 



Eremochaetus: Diptera in which there is a general absence of bristles. 



Ericeticolous: living in poor, sandy or gravelly places. 



Ergatandrous: applied to ants with worker-like males. 



Ergatogynous: applied to ants with worker-like females. 



Ergatoid: sexually capable, wingless ants, resembling workers. 



Eroded -sus: gnawed; a margin with irregular teeth and emarginations. 



Eruca: broadly a larva; more specifically a caterpillar. 



Eruciform: like a caterpillar in form or appearance. 



Erucina: the caterpillar-like larvae of sawflies and the like. 



Erucivorous: a feeder on caterpillars; said of parasites. 



Erythraeus: red; nearly arterial blood-red: carmine, a little diluted. 



Erythrinus: deep brick-red, tending to blood-red [vermilion with a little 

 Indian red]. 



Escutcheon: the scutellum in Coleoptera. 



Essential character: see specific character. 



Ethology: see ecology. 



Eucephalous: with a well-developed head, bearing the normal appendages: 

 applied to certain dipterous larvae. 



Eucone: a compound eye in which the individual ocelli have crystalline 

 cones : see acone. 



Euorthoptera: the Orthoptera excluding the Dermaptera. 



Euplexoptera: with beautifully folded wings: an ordinal term applied to the 

 ear-wigs. 



Ecus or -eus: as a suffix, indicates the possession of the quality of the stem 

 word : e. g., membraneous, like a membrane in texture. 



