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.