Interneural: between the nerves (or veins) of wings.

Interno-mandibular: applied to one of the pairs of salivary glands in bees, situated at the inner side of base of mandible.

Internomedian: in Orthoptera; = cubitus (Comst.); q.v.

Interocular: between the eyes.

Interplical: lying between folds; specifically applied to the alternate ridges and grooves in a.n.a.l area of secondaries of Orthoptera.

Interposed sectors: in Odonata; 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.

Inters.p.a.ce: Coleopteran; the plane surface between elytral striae: Lepidoptera s.p.a.ces between wing veins not included in closed cells.

Inters.p.a.ceal: occurring in the inters.p.a.ces between two wing veins or two elytral striae.

Interstice -tium: s.p.a.ce between two lines, whether striate or punctate.

Interst.i.tial line: the elevated ridge between two striae or series of punctures.

Interval: the s.p.a.ce 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 thes.p.a.ce between two veins.

Intestinal caec.u.m: that point of the large intestine in front of the junction with the small intestine.

Intestine: that part of the alimentary ca.n.a.l through which the food pa.s.ses 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 v.a.g.i.n.a of the mother.

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

Intromittent: used for throwing within.

Intromittent organ: the p.e.n.i.s; q.v.

Introse -um: directed inward, toward the body.

Intrusus: seemingly impressed with a sharp point.

Intumescent: enlarged; swollen: expanded.

Inv.a.g.i.n.ate: when a tubular or vesicular part is turned inward or retracted within the body wall.

Inv.a.g.i.n.ation: a pouch or sac formed by an infolding or indrawing of the outer surface.

Invest.i.tus: unclothed: a surface without scales or hair.

Involucrate: = involute.

Involucrum alarum in Dermaptera a flap of the metanotum.

Involute: spirally rolled inwardly.

Involuti: b.u.t.terflies whose larvae live in a folded leaf; Hesperidae.

Iridescent: a surface which reflects the prismatic hues.

Iridicolor: any color so broken up as to reflect the prismatic hues.

Iris: the circle which, in an ocellate spot surrounds the pupil.

Irised: with rainbow colors.

Iris-pigment: = iris tapetum.

Iris tapetum: the pigment layer of the compound eye just below the crystalline cone.

Irregular: unequal, curved, bent or otherwise twisted or modified without order or symmetry, e.g. certain antennae.

Irrorate: marked with minute points; freckled.

Isabelline -us: pale yellow with some red and brown [chronic lemon with a little carmine and roman sepia].

Ischia: = pleura; q.v.

Iso-: equal.