: only the upper part of head, or vertex, covered with hair.
Commensal: one who eats at another's table: applied to species that
feed on the surplus supply of another, without destroying the owner of
the supply.

Commensalism: applied to this manner of living and eating together.

Comminute: to grind up fine: to reduce to minute particles.

Commissure: the nerves connecting two ganglia: the point of meeting
or union of two bodies: a bridge connecting two bodies or structures;
e.g. tracheal tubes.

Common: of frequent occurrence: occurring on two adjacent parts: a
band or fascia is common when it crosses both primaries and
secondaries.

Communal: applied to life or dwelling in colonies like ants and bees.

Comose: ending in a tuft or brush.

Complanate: compressed: flattened above and below: = deplanate.

Complemental: applied to sexed forms in the Termitidae, capable of
reproduction, but which do not reach the winged stage; the females
are less fertile than the forms that become winged and several may be
used in one nest to replace a lost queen or mature female.

Complicant: when one elytron extends over the other and partially
covers it.

Complicate: longitudinally laid in folds: intricate as opposed to
simple.

Component: one part of a combined whole.

Compound: made up of many similar or dissimilar parts.

Compressed: flattened laterally.

Concatenate: linked together in a chain-like series.

Concave: hollowed out; the interior of a sphere as opposed to the
outer or convex surface: concave veins are those that occupy the
bottoms of troughs or grooves on the upper surface of a wing; see
convex veins.

Concavo-convex: hollowed out or concave on one surface, rounded or
convex on the other; like a small segment of a hollow sphere.

Concentrated: gathered together at one point; intensified or
strengthened by evaporation.

Conchate: applied to the shell-like inflation of the auricle in the
cephalic tibia of Orthoptera.

Concinne: neat; fine.

Concolorous: of the same general color.

Concretion: a massing together of parts or particles.

Concurrent: applied to a vein which arises separately, runs into
another and does-not again separate.

Conduplicate: doubled or folded together.

Condyle: a process which articulates the base of the mandible to the
head: in general any process by means of which an appendage is
articulated into a pan or cavity.

Confertim: closely clustered or crowded.

Co