wing; = alar
appendage; posterior lobe: and has been used as = alula.

Alutaceous: rather pale leather brown [burnt sienna]: covered with
minute cracks, like the human skin.

Alveolate: furnished with cells: deeply pitted.

Alveolus: a cell, like that of a honeycomb.

Amber: a transparent, clear, pale yellowish brown; of the color of
amber [a mixture of pale cadmium yellow and a little burnt umber].

Ambient vein: Diptera; the costal vein when it extends beyond the
apex and practically margins the wing.

Ambrosia: bee-bread: the food cultures of certain Scolytid beetles.

Ambulatoria: that series of Orthoptera in which the legs are fitted for
walking only; Phasmids.

Ambulatorial: fitted for walking or making progress on the surface.

Ambulatorial setae: specialized hairs or bristles, situated on the
ventral segments of the abdomen of some Coleoptera.

Ambulatory: moves by walking; formed for walking.

Ametabola -ous: insects without obvious metamorphoses, in which
the larvae usually resemble the adult and the pupae are active.

Ametabolion: an insect that has no distinct metamorphoses.

Amethystine -us: bright blue with a reddish admixture; clear like an
amethyst [between mauve and lilac].

Amnion: the inner of the two membranes enveloping the embryo.

Amnion cavity: a tube-like insinking from the ventral plate of the
embryo, extending cephalad.

Amnion fold: the extensions of the amnion which close the mouth of
the amnion cavity in the embryo.

Amnios: the first cast skin of the larva when a moult occurs almost
immediately after emergence from the egg.

Amoebiform: having the appearance or properties of an amoeba.

Amoeboid: applied to movements similar to those of an amoeba.

Amphibiotica: those pseudoneuropterous insects whose larvae are
aquatic but whose imagos are aerial; stone-flies; May-flies;
dragonflies.

Amphimixis: the mingling of the germ plasm of two individuals.

Amphiodont: applied to those forms of male Lucanids bearing
mandibles of medium size, between teleodont and priodont;
=mesodont.

Amphipneustic: applied to larvae which have the spiracles confined to
the anterior and terminal segments.

Ample: broad; large; sufficient in size.

Amplected: when the head is received into a concavity
of the prothorax; e.g. Hister.

Ampliate -us: moderately dilated.

Amplificatus: dilated; enlarged.

Ampulla: Orthoptera; an extensile sac between head and prothorax
used by the youn