se -us: with markings of closely crowded small spots.

Adsternal: situated next or close to the sternum.

Adult: the stage when an insect is sexually mature and ready to
reproduce normally.

Aduncate -cus, -catus: a part gradually bent through its whole extent.

Adventitious: occurring accidentally, out of the ordinary course,
without apparent reason.

Adventral line: in caterpillars, extends along the under side between
the middle and the base of legs.

Adventral tubercle: on the abdominal segments of caterpillars on the
inner base of the leg, and correspondingly on the apodal segments;
constant: is number VIII of the abdominal series (Dyar).

Aeneous -eus: shining bronze or brassy.

Aenescent: becoming or appearing bronzed or brassy.

Aequale: equal.

Aequilate-us: of equal breadth throughout.

Aerial: living in the air; applied to flying insects.

Aeriductus: a spiracle: the tracheal, gill-like structures of aquatic
larvae: more specifically the tail-like extensions of rat-tailed maggots
and some aquatic Hemiptera.

Aeroscepsin: an indefinite sense of perception supposed to be located
in the antenna.

Aeroscepsy: The faculty of observing atmospheric changes: supposed
to be located in the antenna.

Aerostats: a pair of large air sacs at base of abdomen in Diptera.

Aeruginose -us: the color of verdigris [blue green].

Aestival: occurring in summer.

Aestivation: applied to summer dormancy.

Afferent: carrying inwardly or toward the centre.

Affinis: related to: similar in structure or development.

Afternose: a triangular piece below antennae and above clypeus: see
postclypeus.

Agamic -ous: reproducing without union with a male.

Agamogenesis: reproduction without fertilization by a male: see
parthenogenesis; gamogenesis.

Agglomerate: heaped or massed together.

Agglutinate: stuck or glued together; welded into one mass.

Aggregated: crowded together as closely as possible.

Agnathous: without jaws; specifically applied to those Neuropteroid
series in which the mouth structures are obsolescent.

Aileron: the scale covering the base of primaries in some insects; see
tegulae in Diptera = alula and squama, q.v.

Air-sacs or vesicles: pouch-like expansions of tracheal tubes in heavy
insects, capable of inflation and supposed to lessen specific gravity.

Air-tube: a respiratory siphon.

Ala -ae: a wing or wings.

Alar appendage: see alulet.

Alar frenum: a small ligament crossin