the shorter longitudinal veins
occurring in the wings of some species between the chief veins; =
supplementary sectors. Interrupted: broken in continuity, but with
the tips of the broken parts in a right line with each other.

Intersegmental: = interarticular; q.v.

Interspace: Coleopteran; the plane surface between elytral striae:
Lepidoptera spaces between wing veins not included in closed cells.

Interspaceal: occurring in the interspaces between two wing veins or
two elytral striae.

Interstice -tium: space between two lines, whether striate or punctate.

Interstitial line: the elevated ridge between two striae or series of
punctures.

Interval: the space or time between two structures, sculptures or
periods of development.

Interventricular: the inner valve between the chambers of the heart.

Interventricular valvule: of heart, lies in front of seluilunar valve.

Intervenular: in thespace between two veins.

Intestinal caecum: that point of the large intestine in front of the
junction with the small intestine.

Intestine: that part of the alimentary canal through which the food
passes from the stomach, in which absorption is completed and the
excretions are formed for expulsion.

Intima: the lining membrane of the trachea: see endotrachea.

Intorted: turned or twisted inwardly.

Intra-: within: between.

Intra-alar bristles: in Diptera; a row of two or three between the
supra-alar and dorso-central groups.

Intracellular: occurring within the cell or in a cell.

Infra-humeral bristles: in Diptera calyptrata; occur immediately in
front of the thoracic suture, between the humeral callus and the
presutural depression.

Infra-ocular: situated within the eye, actually or apparently.

Intra-pulmonary: that method of respiration which does not involve
movements of the outer body wall and is confined to the respiratory
organs.

Intrauterine: applied to development, when the young hatch within
the vagina of the mother.

Intricate: irregular: confused; applied to markings and sculpture.

Intromittent: used for throwing within.

Intromittent organ: the penis; q.v.

Introse -um: directed inward, toward the body.

Intrusus: seemingly impressed with a sharp point.

Intumescent: enlarged; swollen: expanded.

Invaginate: when a tubular or vesicular part is turned inward or
retracted within the body wall.

Invagination: a pouch or sac formed by an infolding or indrawing of
the outer surface.