Explanation of Terms Used in Entomology Part 4

a.n.a.l foot: applied to the tip of the body in larval Chironomids, which is modified to serve as a hold-fast.

a.n.a.l furrow: in wings, lies between the cubitus and 1st a.n.a.l vein.

a.n.a.l glands: appendages of the alimentary ca.n.a.l, opening into it near the posterior extremity, secreting either a lubricant, a silk-gum, or some other specialized material.

a.n.a.l horns: in Collembola, are small processes borne on the last abdominal segment.

a.n.a.l lobes: in Lecaniinae, a pair of small, triangular, hinged processes forming a valve which covers the a.n.a.l orifice.

a.n.a.l loop: Odonata; the loop formed by the angulations of 1st a.n.a.l vein.

a.n.a.logous: similar in function; but differing in origin and structure: e.g. the wings of birds and insects: see h.o.m.ologous.

a.n.a.l operculum: the dorsal arch of the 10th abdominal segment; in caterpillars = supra-a.n.a.l plate, q.v.

a.n.a.l organs: Collembola; the two modified hairs arising from a tubercle ventro-cephalad of the a.n.u.s and usually curving caudo-dorsad.

a.n.a.l orifice: see a.n.u.s.

a.n.a.l papilla: Collembola; see a.n.a.l tubercle.

a.n.a.l plate: in caterpillars, the s.h.i.+eld-like covering of the dorsum of the last segment: in the embryonic larva the 11th tergite.

a.n.a.l ring: a chitinous ring encircling the a.n.u.s in many Coccidae.

a.n.a.l scale: one of the lateral processes of the ovipositor in Cynipidae, lying outside and below the lateral scale.

a.n.a.l siphon: the a.n.a.l breathing tube of Culicid larvae.

a.n.a.l style: a slender process on or within the terminal segment of the abdomen in h.o.m.optera.

a.n.a.l tubercle: Collembola; the tubercle bearing the a.n.a.l organs: = a.n.a.l papilla.

a.n.a.l tubercles: a pair of prominent, rounded or conical processes, situate one on each side of the a.n.u.s in certain Coccids.

a.n.a.l valves: see podical plates.

a.n.a.l veins: those longitudinal unbranched veins extending from base to outer margin below the cubitus; the first a.n.a.l, also termed vena dividens, q.v., is the 6th of the series starting from the base, and it may be followed by several others which are numbered in order to the inner margin.

Anastomosing: inosculating or running into each other.

Anastomosis: a running together; usually applied to wing veins, often to markings; sometimes used like stigma, q.v.; also in Neuroptera, a series of cross-veinlets nearly in one row; a connecting series of veinlets.

Anceps: two-edged; similar to ensiform, q.v.

Ancestral: primitive; inherited from an earlier form or ancestor.

Anchor process: = breastbone, q.v.

Anchylosed: grown together at a joint.

Ancipital: with two opposite edges or angles.

Androconia: specialized, usually small scales of peculiar form, found localized on some male b.u.t.terflies.

Androgynous: uniting the characters of both s.e.xes.

Aneurose: a wing without veins except near costa.

Angle: of tegmina, "is the longitudinal ridge formed along the interno-median by the sudden flexure from the horizontal to the vertical portion when closed."

Angular area: Hym.; the posterior of the three areas on the metanotum between the lateral and pleural carinae; = 3rd pleural area.

Angulate: forming an angle; when two margins meet in an angle.

Angulose: having angles.

Angulus: forming an angle: = angulate.

Angustatus: narrowed; narrowly drawn out.

Anisoptera: that division of the Odonata in which the hind wings are wider, especially at base, than the front wings.

Annectent: applied to connecting or intermediate forms.

Annelet or annellus: Hym.; small ring-joints between scape and funicle.

Annulate: ringed or marked with colored bands.

Annulet: a small or narrow ring or annulus.

Annuliform: in the form of rings or segments.

Annulus: a ring encircling a joint, segment, spot or mark; sometimes applied to the inner ring encircling the mouth opening.

Annulus antennalis: the ring sclerite of the head into which the basal segment of the antennae is inserted; = antennal sclerite.

Anomalous: unusual; departing widely from the usual type.

Anoplura: wingless species without metamorphosis, habits epizootic, thoracic segments similarly developed: a composite aggregation which includes both the biting and sucking lice.

Ante: before; used as a prefix.

Ante-alar sinus: Odonata; a grooved area extending transversely immediately in front of the base of each front wing.

Ante-apical: just before the apex.

Ante-clypeus: Odonata; the lower of the two divisions of the clypeus; the inferior half of the clypeus whenever there is any apparent line of demarcation: = clypeus-anterior; infra-clypeus; rhinarium; second clypeus.