Explanation of Terms Used in Entomology - novelonlinefull.com
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Dorso-alar region: Diptera; between the transverse suture and the scutellum on one side and the root of the wing and the dorso-central region on the other.
Dorso-central bristles: Diptera; two or four longitudinal rows on the inner part of the dorsal.
Dorso-central region: Diptera; bounded by two imaginary lines drawn from the scutellar bridges forward, and coinciding with a s.p.a.ce free from bristles that exists on the outer side of the dorsal rows and is often occupied by a dorsal thoracic stripe.
Dorso-humeral region: Diptera; bounded by the anterior end of thorax and transverse suture on two sides and by the dorsopleural suture and dorsocentral region on the two others.
Dorsolum: the mesoscutum.
Dorsopleural suture: Diptera; the lateral suture between dorsal and pleurum from the humeri through the base of the wing: separates the mesonotum from the pleura.
Dorso-ventral: in a line from the upper to the lower surface.
Dorsulum: the mesonotum before the scutellum, with the wing sockets: also, specifically, the meso-scutellum.
Dorsum: the upper surface: in Coleoptera; often confined to meso- and meta-thorax: Odonata; includes mesepisterna and meso- and meta-thoracic terga: Diptera; upper surface of thorax, limited by the dorsopleural sutures laterally, the scutellum posteriorly and the neck anteriorly: Lepidoptera; the lower or inner margin of the wing.
Draw-thread: the silk-producing gland.
Drone: in Hymenoptera; the male bee.
Duct: a channel, tube or ca.n.a.l for carrying a secretion from a gland to the point of discharge.
Ductus ejaculatorius: the single duct or tube formed by the union of the vasa deferentia from each side, through which the seminal fluid is ejected into the v.a.g.i.n.a.
Dufour's gland: that gland, in Hymenoptera, that secretes the alkaline portion of the poison carried by the sting.
Duodenum: the chylific ventricle; also applied to the first section of the digestive tract just behind entrance of malpighian tubules.
Dupion: a coc.o.o.n spun by two silk-worms together; also the coa.r.s.e silk from such a coc.o.o.n.
Duplicate -us: double.
Duplicate-pectinate: having the branches of a bipectinated antenna alternately long and short.
Duple: double, or twice.
Durus: hard.
Dusky: somewhat darkened; pale fuscous.
E
E: as prefix, is privative and means without.
Ears: organs of hearing, as on the first tibiae or on the first abdominal segment of some Trichoptera.
Ebenine: black like ebony.
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 p.r.i.c.kles.
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 sh.e.l.l 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 v.a.g.i.n.a.