t 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.

Ephemeroptera: briefly winged: = ephemerida; q.v.

Epiblast: the outer germ layer of the embryo.

Epicranial: relating or pertaining to the epicranium.

Epicranial lobe: in caterpillars, the lateral, superior convex lobe of the
head.

Epicranial plate: in some larvae a plate-like structure forming the
epicranium.

Epicranial suture: the line of junction of the two procephalic lobes.

Epicranium: the upper part of the head from the front to the neck:
often used to include front, vertex and genae:= calva.

Epideme: see articulatory epideme.

Epiderma -is: the cellular layer of the skin, underlying and secreting
the cuticula: incorrectly applied to the outer skin or cuticle.

Epidermata: abnormal excrescences or outgrowths from the skin.

Epididymis: the convoluted efferent ducts, massed at the posterior
part of the testes.

Epigastrium: the first entire ventral sclerite of the abdomen.

Epigenesis: the doctrine of growth from an undifferentiated germ, as
opposed to preformation, which implies development from already
existing rudiments.

Epigenetic: the period after the union of the male and female
elements, during which organs are forming.

Epiglossa: = epipharynx; q.v.

Epiglottis: = epipharynx; q.v.

Epilabrum: a sclerite at each side of the labrum: specifically applied
in myriapods.

Epilobe: of mentum in Carabidae, really corresponds to a partially
divided ligula: a lateral appendage of a bilobed mentum.

Epimera -eron: the posterior lateral thoracic sclerites; usually small,
narrow or triangular.

Epiopticon: the second ganglionic swelling of the optic tract: see
opticon.

Epipharyngeal: belonging or relating to the epipharynx.

Epipharyngeal sclerites: in bees; a pair of strap-like pieces extending
backward from the two sides of the base of epipharynx: see
hypopharyngeal sclerites.

Epipharynx: an organ, probably of taste, attached to the inner surface
of the labium and supposed to correspond to the palate of higher
animals Epiglossa or epiglottis.

Epiphysis: a lappet-like process covering an excavation on the fore
tibia of many Lepidoptera.

Epipleural: the deflexed or inflexed portions of the elytra, immediately
benea