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.