USED IN ENTOMOLOGY. 45 



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 larvse a plate-like structure forming the epi- 

 cranium. 



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 gense : = 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 op- 

 posed to preformation, which implies development from already existing 

 rudiments. 



Epigenetic: the period after the union of the male and female elements, dur- 

 ing 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 Carabidee, really corresponds to a partially divided 

 ligula : a lateral appendage of a bilobed mentum. 



Epimera-eron: the posterior lateral thoracic sclerites; usually small, nar- 

 row 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 back- 

 ward 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 labrum 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. 



Epipleura: the deflexed or inflexed portions of the elytra, immediately be- 

 neath the edge : the inflexed portions of the pronotum are sometimes called 

 prothoracic epipleura : as generally used, the term is incorrectly applied to 

 the entire bent under margin of the elytra. 



Epipleural fold: the raised lower edge of the epipleura: see hypomera. 



Epiploon: see caul. 



Epipygium: the dorsal arch of the last abdominal segment. 



Episternites: the upper pair of corneous appendages forming the ovipositor 

 in grasshoppers. 



