Ectotrophous: with mouth parts free; not buried in the head: see entrotrophus.
Efferent: carrying outward or away from the centre.
Effluvium: a foul or unpleasant smell or emanation.
Effected: somewhat angularly bent outward.
Egg: a simple cell, capable of fertilization, containing the germ, the food-yolk necessary for its nutriment, and a covering membrane: a single ovum or cell from an ovary: the first stage of the insect.
Egg-burster: a projecting point on the head or other part of an embryo, used in breaking the shell when hatching.
Egg-calyx: the enlarged portion of the oviduct at the opening of the ovarian tubes, into which the egg is received before its entrance into the vagina.
Egg-case: the case or covering prepared or secreted by an insect to contain or hold together the egg-mass as a whole: see oötheca.
Egg-guide: Orthoptera; two small pointed prolongations of the ventral portion of the 8th abdominal segment, between upper and lower valves, used in oviposition.
Egg-pod: applied to the egg-mass of grasshoppers.
Ejaculatory duct: see ductus ejaculatorius.
Elastic: a part which has a degree of flexibility throughout.
Elater: the spring or forked tail of Podurids.
Eleutherata: all forms with free, separated maxillae; later, and more specifically, the Coleoptera.
Elevate -us: a part higher than its surroundings.
Elinguata: without a tongue: forms in which the maxillae are connate with the labium: see synista.
Elliptical: oblong-oval, the ends equally rounded, together forming an even ellipsoid.
Elongata -ate: drawn out; lengthened; much longer than wide.
Elytra: the anterior leathery or chitinous wings of beetles, serving as coverings to the secondaries, commonly meeting in a straight line down the middle of dorsum in repose: also applied to the tegmina in Orthoptera.
Elytral ligula: a tongue-like process on the inner face of the side margin of elytra, to perfect the union with the ventral segments: e.g. in Dytiscidae.
Elytriform: shaped or appearing like an elytron.
Emandibulata: that series of insects in which there are no functional mandibles in any stage.
Emandibulate: lacking functional mandibles; e.g. butterflies and moths, and applied in any stage.
Emarginate: notched: with an obtuse, rounded or quadrate section cut from a margin.
