tures or processes of the pupa, often on the
head, by means of which it works its way out of the cocoon.

Coecal: ending blindly, or in a closed tube or pouch.

Coecum: a blind sac or tube: applied to a series of appendages
opening into the alimentary canal at the junction of the gizzard and
chylific ventricle: see caecum; the two are used interchangeably.

Coeloblast: the endoderm in the narrower sense.

Coelom: the body cavity.

Coelomic cavity: the space between the viscera and the body wall.

Coelom-sac: the cavity containing the viscera: in embryology one of a
pair of closed sacs, arising in the mesoderm of each segment of the
embryo and giving rise to more or less of the coelom of the adult.

Coenogonous: oviparous at one season of the year, ovoviviparous at
another, as in Aphididae.

Coeruleus -eous: sky-blue: see caeruleus.

Coincident: when two wing veins run together or lie, one in
continuation of the other so as to appear like one.

Coleoptera: sheath-winged: an order with the primaries coriaceous,
used as a cover only, meeting in a straight line dorsally; mouth
mandibulate; pro-thorax free; transformation complete: the beetles:
the term has also been applied to the two elytra together.

Collar: in general any structure between the head and thorax:
specifically, in Hymenoptera, the neck; in Diptera, may mean the
neck, the sclerites attached to the thorax, the thorax itself, or its
processes (ante furca): in Coleoptera, is the narrowed thorax; in
Lepidoptera, applied to the sclerites attached to the thorax and which
shield the neck.

Collembola: an ordinal term applied to species which are apterous;
have no metamorphoses; have variably developed abdominal
saltatorial appendages and a peculiar ventral tube at base: the
spring-tails.

Colleterial gland: see Colleterium.

Colleterium: a glandular structure accessory to the oviduct, secreting
the viscid material used in cementing the eggs together.

Collophore: the sucker-like organ extended from the underside of the
abdomen in Collembola.

Collum: the neck or collar: the slender connection between head and
thorax in Hymenoptera and Diptera; in Coleoptera, the posterior,
narrow part of the head or even the thorax: loosely used.

Colon: the large intestine; that usually enlarged portion of the
alimentary canal before the rectum.

Columella: a little rod, pillar or central axis.

Columnar: cylindric, but tapering toward one end.

Comate -us