Part 46

Eburneous: ivory white.

Ecalcaratus: without a spur.

Ecaudate: without tails or tail-like processes: usually applied to wings : = excaudate.

Ecdysis: the process of casting the skin; moulting.

Echinate: set with prickles.

Ecology: the science of the relation of organisms to each other and to their surroundings: = ethology. {Scanner's comment: Ethology nowadays refers to studies in animal behaviour, not directly to ecology.}

Ectad: extending outwardly from within.

Ectal: belonging or relating to the outer surface.

Ectoblast: the outer wall of a cell; 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.