ell; the ectoderm or epiblast.

Ectoderm: the outer layer of skin: the outer layer of the blastoderm,
giving rise to the nervous system and to epithelial structures of the
body surface.

Ectognathus: see ectotrophous.

Ectoskeletal: referring to the outside or exoskeleton.

Ectotrachea: the outer surface or layer of the trachea.

Ectotrophous: with mouth parts free; not buried in the head: see
entrotrophus.

Edematus: dull translucent white.

Edentate -ulous: without teeth.

Edentula: those having no teeth.

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 ooetheca.

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-pouch: see ooetheca.

Egg-pod: applied to the egg-mass of grasshoppers.

Egg-tube: see ovarian tube.

Ejaculatory duct: see ductus ejaculatorius.

Elastic: a part which has a degree of flexibility throughout.

Elate -us: see elevatus.

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.

Ellipsoidal: see elliptical.

Elliptical: oblong-oval, the ends equally rounded, together forming an
even ellipsoid.

Elongata -ate: drawn out; lengthened; much longer than wide.

Elutus: with scarcely distinct markings.

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